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Admin panel probs
it's NOT an cpanel problem dude. FTP back into your web space, re-upload the site, but make sure that the CMS you're uploading is not a corrupt download.
If all is well, then it should work. You can't change the cpanel, if you don't own the server – I'm guessing it's hosted, though.
Good luck with it, and report any problems or successes back here.