ispcp error 500

[thid]

ok so I spend sometimes checking out ispcp it looks like the problem is with ispcp . If I try to do any modification that are connected to apache I get error 500. The logs from the actions are totaly poor. The problem isn't connected to problems with system or high trafic or to many users. Yet I still dont have any idea where could be the problem, maybe its something with scripts or daemon.

Anyway could someone give me a clue where to start looking or what should I check?