After transfer of site MAGENTO get make error, and see few page BLANK

We have make the transfer of site MAGENTO from old hosting to an server dedicated, transfer done correctly, three time, but an limitation on code depend it The site has been migrated from one host to another. The last host dint had cpanel it was core linux and now, the site is running on cpanel. The permissions issue has been fixed and all the permission have been restored. There was cache issue. So, that has been fixed. There are some modules that has to be seen like IP Security Module, Aitsys Module. So, the main issue is the sub pages aren't browsing and secondly, under admin catalog->URL rewriting goes blank. So, I believe there is a URL Rewriting issue. [login to view URL] settings has been made according to the magento and also htaccess. Base url and everything else has been setup. So, no need to check that. Just look for the url rewriting. Rest, everything runs fine. You must check code, and understand, what create this error, and solve. Is important solve, what generate this error...because i must go to insert many product Await good reply