Inbound calling with voip innovations

Hello

I have a situation where I have used username/password authentication with voip innovations to set up my trunks. I can call in, however, the call never actually connects. If I pick up the ringing desk phone, the call never connects. I tried this same thing with Wave. When I pick that up, my screen say “Local network connection established. Waiting for remote peer connection”.

The call eventually fails with " SIP Resend Timeout 504 O 3 15"

Can anyone help if this has happened to them?

Thanks
Greg