php fix for new hosting

I have recently changed hosting providers and although I have transfered my files over, it is not functioning properly. I have a php key editor installed which rewrites links from the one stated. This is not functioning properly. for example [login to view URL] would actually link to [login to view URL] using the key editor i can choose it to link to any site which is stored on a text file. I think it is something to do with the .htacces file, but am not certian. I need a freelancer to look at the files and rectify so the site works as it was previously, I have access to my old and new hostings with all files available upon request. Please only bid if you have experience with this type of thing