No Audio / Ring when ATA connected to Router
 

Hi, I have Linksys PAP2 ATA and everything was working fine till morning with all VSP's registered via Voxalot. Now I have connected my ATA via Netgear FR 314 router and I can not make calls via any VSP. Dialing 500 works fine, but when I dial any other number which uses other VSP's dial plans, I do not hear the voice from other end. My call goes through and the phone at other end rings. I am not able to recieve calls even. When I dial my registered VSP's provided number, I hear the call going through but the ATA does not ring. I hope it is a firewall / NAT problem... Please help..