hi 

i make a big mistake to upgrade firmware version of modem "TD-W8901N" from hardware V1 to V3 ..

so i cant update to old version(v1) ERROR msg " ERROR: FAIL TO UPDATE DUE TO... The uploaded file was not accepted by the router"

for this reason i can't get  IP gateway from ISP"

NOW Plase plase help me to solve this problem 

tanks