Have you tried adding this implementation of PowerCMS to another server that you have had success on before? I think this would be the best test for this rite now. If you can get the files in a test directory on another server and get the browse server button to show then it would indicate a server setting issue on the new server. If you get the same result it would indicate a configuration issue with PowerCMS. Please give this test a try and let us know what you experience so that we can look into this further.