IAX and SIP Trunk not able to receive incoming call

Hi,

I configured a IAX and SIP TRunk with FWD PULVER and I can see SIP ONLINE and one phone online.

When I try inbound call to TRIXBOX CE V 2.2.4 then the phone line ring busy. The did number working and my fwd.pulver.com working because I tested it.

So I setup inboud call to receive any calls and I have IVR menu and one phone xlite online.

I use a Modem Cable with router dhcp in DMTZ Zone for my trixbox ce server. Also port 10000 and 8080 are forwarded to trixbox ce server.

But I dont have STATIC IP address but only DYNAMIC with NAT.

So my problem is it possible that its because I have Dynamic IP with NAT or its something else?

Thank you!

Dimnet2000