Need help. Can no longer access AdminCP

I attempted to install the Ban List Hack and was not sucessfull. After removing the files and undoing what I did to them I still get massive errors. They seem to be manifesting in everything form Signatur/Avatar problems all the way to me not being able to access the AdminCP

You can see for yourself at http://planetside.info/forum

When I put my information in the AdminCP login it just dumps me back at the login screen with this line at the top:

//set fieldid's of banreason field and banuser field $banreasonfieldid=10; $banuntilfieldid=11;

Im sure I removed all the modifications but apparently I must have missed something or done something incredibly wrong.

Any help you could offer me would be greatly appreciated.

[Obi-Wan]

I recon u got the original file functions.php from the admin dir.

I suggest you upload that and see if it works again and maybe give it another go.....i'm not that technical but that's what I would do

[TreizeAtreides]

Nope. Nothing. I still get the same errors. Please, anyone who can help me do so.