[dxflw]

Some keyloggers easy very hard to find with a simple home antivirus or internet security software.The best software about is antivirus for companys like SOFOS (about 1000 $$).
I think my friend you should format your pc.Save the very important files from your pc and offcourse your site backups (if you have) and then begin the new installation of your OS.
Don't copy any .exe files or files you dont know about it with your important files for the backup.After the format make sure you have installed a good antivirus or better internet security software (payed licence not cracked) and then change all your pasword you are using in the internet.
This way maybe (not 100% sure) will solve your problem.If not i don't know how to continue.
Better contact you hosting company after the format.

--------------- Added [DATE]1239759477[/DATE] at [TIME]1239759477[/TIME] ---------------

One think:
If your are webpage owner or you use your pc with the internet for important and sirius work then never trust something you don't know and never use cracks or cracked software (warez)
Use only original programs to have your head in silence.lol