Cannot format my MMC card , ITs infected with w32 brontok virus?

i am using an 512 mb MMC card on my nokia n70 & now the phone doesnt detect the phone , & when i tried to format it in windows using card reader , ,y antivirus found virus n my card& its name is w32 brontek.q , my Av cleans the virus but after 2 or 3 seconds the virus come again in the card, even i had deleted the files from memmory cards , all my files are automatically comes again , any solution for there, i had tried almost all the antivius & Antispy Programs.