1. In Interfaces>Assign->Wireless as i suspected add ur wireless clone as BSS under some name.
2. Then in Interfaces> choose for wan that particular clone of wireless card
3. Next step in Interfaces>WAN way down properly configure parameters of ur home wireless network, BSS, encription, channel key etc.
4. In System-> General setup just switch on 1st dns server from none to WAN
apply each step, and everything work as charm. Cheers