Error 500 only in Controllers

Hi
When I move my app to another serwer and open in  controller see error 500.
Adress / works fine and another serwer works all links.

I think that is version php because on this serwer is 5.2.6 but I need 5.2.8. It is possible that lower version generate error 500?
Maybe something else can generate this error. I can't access to logs.

Thanks for help.
Sorry for my English

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