my firmware is 2.1 eclair,the problem is with my usb drivers..i installed every drivers of my phone n even its showing in the device manager (adb,android modem,samsung usb composite) but the thing is when i switch my phone in to the download mode to root my phone but my phone is not getting detected and no drives (adb,android modem,samsung usb composite) are shown in drives manager....i tried everything so plz help me out i want to root my phone 
