HTTP ERROR 500

[Cleggeh]

I have just moved my Magento site, and im getting a HTTP ERROR 500 when trying to save or view some pages Like

View:

admin/system_config/edit/section/system/

Edit:

admin/system_config/edit/section/payment/

Any help would be grateful

[Pronto]

I'm pretty sure Magento var/log folder has files that have lot to say about it. Especially system.log and exception.log