[Serusers] PHP warnings

[Llanos Serna García-Conde]

Hi all,when I try to open serweb's login screen, I get the following errors:

Warning: Client does not support authentication protocol requested by 
server; consider upgrading MySQL client in 
/var/www/html/serweb/serweb_2004-07-27/phplib/db_mysql.inc on line 73
Database error: pconnect(localhost, ser, $Password) failed.
MySQL Error: ()
Session halted.

When I start APACHE, I get all these warnings:
PHP Warning:  Function registration failed - duplicate name - mysql_connect 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_pconnect 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_close in 
Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_select_db in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_create_db in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_drop_db 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_query in 
Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_unbuffered_query in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_db_query 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_list_dbs 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_list_tables in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_list_fields in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_error in 
Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_errno in 
Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_affected_rows in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_insert_id in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_result 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_num_rows 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_num_fields in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_fetch_row in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_fetch_array in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_fetch_assoc in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_fetch_object in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_data_seek in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_fetch_lengths in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_fetch_field in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_field_seek in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_free_result in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_field_name in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_field_table in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_field_len in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_field_type in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_field_flags in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_escape_string in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_get_client_info in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_get_host_info in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_get_proto_info in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_get_server_info in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql in 
Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_fieldname in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_fieldtable in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_fieldlen 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_fieldtype in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_fieldflags in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_selectdb 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_createdb 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_dropdb 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_freeresult in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_numfields in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_numrows 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_listdbs 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_listtables in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_listfields in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_db_name 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - mysql_dbname 
in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - 
mysql_tablename in Unknown on line 0
PHP Warning:  mysql:  Unable to register functions, unable to load in 
Unknown on line 0

Do you know the reason for these warnings? Do they have any relation with 
the error I get when trying to connect? Can you help me please?
Thank you
Llanos