asterisk users - Oct 2005 - my SIPURA ATA does not make calls thru teliax

Greetings!

Dear List,

I had been making calls thru teliax for more than two month using my SIPURA
ATA. but one day when my a/c balance fell around $ 18.00 (one month ago) and
after that it could not make any calls thru teliax. until now I can not make
calls. Mr. David said that their side is ok and check my side. But I did not
change any setting in my device when it beginning to happen. before I use
g729 (only) but now I have activated all the codecs in both sides. but
unfortunately, I can not make calls yet. it gives an engaging tone. I can
see my SIPURA ATA is always registered to the provider (teliax).

Does anyone have any idea about this matter?

Thanks in advance

Mohan Kumara