Upgrade Firmware Dlink Dir-615

Finally i found solution about the problem on the article i wrote before (here). on that article i found dificulties how to share internet using Dlink router wireless dir-615. it was so strange for i am cos router dlink i tested to ISP (speed) its working normally and i set it up to ISP (3Gnet) the conection is too bad even its doesn't want working..

after in a days i am googling asked to help ones expert in this case.. i got the right solution that is with upgrading firmware for its DLink Router Dir-615 in this link https://ftp.dlink.ru/pub/ ... and now the router wireless is going fine