I use Fedora Core 5 and when I launch openser in TLS mode :

0(13701) init_tls: Entered 0(13701) WARNING:init_tls: disabling compression due ZLIB problems 0(13701) ERRRO:init_tls: null openssl compression methods 0(13701) could not initialize tls, exiting...

How can I fix this ?

Thank :)