i have set up clam antivirus on moodle 2.2.2+ with the following setting:

Use clam AV on uploaded files run clam on upload: on

clam AV path path to clam: C:\Program Files\ClamWin\bin\clamscan.exe

Quarantine directory quarantine dir: blank

On clam AV failure clam failure on upload: treat files like virus

every time i upload anything, it comes back with 'the file you have uploaded 'filename' has been scanned by a virus checker and found to be infected! your file upload was NOT successful'

Can Anyone help?