[Serusers] Crash in Ser

Dear Ser Users I have a PII-400, 64Mb with Fedora Core 1 instaled, and the ser is working good, but the time in time the SER crash and the message in /Var/Log is : ser[1512]: WARNING:fm_free: free(0) called Sep 10 15:30:07 sip ser[1511]: WARNING:fm_free: free(0) called Sep 10 15:30:11 sip ser[1512]: WARNING:fm_free: free(0) called Sep 10 15:30:15 sip ser[1512]: WARNING:fm_free: free(0) called Sep 10 15:30:19 sip ser[1511]: WARNING:fm_free: free(0) called Sep 10 15:30:23 sip ser[1512]: WARNING:fm_free: free(0) called Sep 10 15:30:27 sip ser[1511]: WARNING:fm_free: free(0) called Sep 10 15:30:31 sip ser[1512]: WARNING:fm_free: free(0) called Sep 10 15:35:10 sip ser[1491]: child process 1512 exited by a signal 11 Sep 10 15:35:10 sip ser[1491]: core was not generated Sep 10 15:35:10 sip ser[1491]: INFO: terminating due to SIGCHLD Sep 10 15:35:10 sip ser[1566]: INFO: signal 15 received Sep 10 15:35:10 sip ser[1510]: INFO: signal 15 received Sep 10 15:35:10 sip ser[1511]: INFO: signal 15 received Sep 10 15:35:10 sip ser[1513]: INFO: signal 15 received Sep 10 15:35:10 sip ser[1567]: INFO: signal 15 received Sep 10 15:35:10 sip ser[1572]: INFO: signal 15 received Sep 10 15:35:10 sip ser[1571]: INFO: signal 15 received Sep 10 15:35:10 sip ser[1569]: INFO: signal 15 received Sep 10 15:35:10 sip ser[1532]: INFO: signal 15 received Sep 10 15:35:10 sip ser[1570]: INFO: signal 15 received can you help me with this issue ?? best Regards gustaff