Voxalot / SIP Broker Support Forums - VoXaLot stopped working two days ago

I was playing with Voxalot for several days last week. Then on Saturday it suddenly stopped working.

First, Web call says "Initiating a call between '001nnn' via 'VoipDiscount' and '001nnn' via 'LowRate Voip'" and the green check mark comes up but the phones don't ring and the providers' "recent calls" screen doesn't show any activity.

Second, with the ATA registered to voxalot (and voxalot dial plan set to use lowratevoip) I am getting fast-busy.

And last, Call forward (that is set to call 001nnn via VoipDiscount) is giving fast busy when I call SipBroker.

Please note, that calling through voipdiscount and lowvoiprate directly works fine, and it was working brilliantly last week.

Did anything change in voxalot?