plesk admin session timeout immediately after login

[muhammedd]

Im using plesk 11. I noticed some times session expires immediately after login for admin user. this was cuncurent with some horde account hacked that sent mass mails with horde. mass mail problem seems to be solved after I found the compromised user. but I need to know how would the account of plesk admin effected with this matter.
I dont know where to look in session logs. are all user logs stored in /var/lib/php/session ?
are plesk session stored some where elses
please help

 

[abdi]

Are you sure this was not caused by dynamic IPs on your network?

 

[muhammedd]

I dont think . however problem seems to solved now as I start plesk every day cz its crashed automatilcly and I have no idea where to look in logs

 

[abdi]

I have no idea where to look in logs

tail -f /var/log/sw-cp-server/error_log