Linksys RTP300 ATA can't make calls!!

[116210]

Hi all

I am kind of a new voxalot user, I have got a Linksys RTP300 ATA and have just signed up for a VoxLite account, and my problem is I can't make calls but I only recieve calls, and I believe that I have entered the Voxalot account detail correctly on my RTP300 ATA, however could you Please note that I have registered 4 voip providers to my Voxalot account:
1/ sipgate.co.uk
2/ ukddi
3/ voipalot.com
4/ 12voip.com
to make more undrstandable here I input the way that it looks on the Voxalot member area:

Voice Service Provider List
================================================== ===
Name Username Host Active Reg. Status
----------------------------------------------------------
sipgate xxxxxxxxx sipgate.co.uk Yes Registered
ukddi xxxxxxxxx sip.ukddi.com Yes -
voipalot xxxxxxxxx sip.voipalot.com Yes -
12voip xxxxxxxxx sip.12voip.com Yes -
================================================== ===

Please note that all I need to do is I want to know how to be able to receive my calls on the first one on the list above which is SIP registered, and make calls with my voipalot and 12voip accounts according to my Smart Call (Dial Plans) settings.

I would highly appreciate your help.

Thank you