Problem with incoming calls..
 

Hi,
My Voxalot registration ID is 200664.
My Voxalot account is set to Register to recieve incoming calls from one VSP.
Every time I rebuild my Voxalot account from scratch, every thing works Ok but after a short while (while Voxalot says 'registered' and every thing is ok) I got no incoming calls anymore. Callees (Incoming calls) get a recording from my VSP reporting an account error.
My VSP say the "contact" information trasmitted by voxalot is not valid
Is Voxalot loosing registration ?! would you please have an insight ?

William