ur method didnt work. when i did as dheeraj told, there came the message- cannot find autorun.inf
wat i did was in the "open with" dialog box, i went to C:\Windows\explorer.exe and clicked OK. i cud open the drive. when i enabled showing of hidden files and folders, i cud c autorun.inf. i deleted it. i copied the contents and formatted the disk. now all is well. i have no problems now. thanks for trying to help.