Voxalot as GW1 on SPA 3102

[crossroads]

I tried to search on this topic but couldn't get any relevent, so here is my problem....

I just bought unlocked SPA 3102. I am using my primary VSP as viatalk. I have configured GW1 and voxalot. Under voxalot I have various betamax accounts ( All are not registered ).
I don't have any luck making call via voxalot as GW1. Here is my cofig on Line1 Gateway 1

Gateway 1: 4xxxxx@us.voxalot.com
GW1 Auth ID: 4xxxxx
GW1 NAT Mapping Enable: No
GW1 Password: my valid voxalot password

The dial rule I have is - |[x*][x*].<:@gw1>|

I tried dialing *600 for echo test but couldn't get anything. I think my outbound call is hitting via GW1 as SIP info tab says

Call 1 Peer Phone: *600@gw1

I tried to play with dial plan with most combinations and then gave up. Now you are my last resort. Could you please advise. I appreciate your help in advance.

Thanks