Moved servers and domain now cant edit?

I have just moved the site from one server to another and also changed the domain.

I managed to get everything back up and running fine except that in the admin section I can't edit payment module settings, store settings, or anything admin related. The only thing I can change is products.

When I edit the setting everything seems fine but when I click update it just redirects to the main admin page and when I go back the settings are the same as they were before I tried to change them.

Any one have any ideas what would be causing this?

Thanks.

Probably your PHP version in conjunction with your old outdated version of Zen Cart.

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