Hi, I am having an issue with a extension when I make it as prepaid. Let me explain you, in Trunk "Rates" Tab I have putted as "USA,1,0.50,60,0.00". In extension I have given Credit $2. Now it shoud work as for 4 minutes. Some times it wotks fine. But some time if i made a call for a minute and after some time again call it says no credit and when i checked extension credit it appears as "0.00" while it should be available for more 3 minutes. Also some times after 1 or 2 calls it shows extension credit as "-1.50" and it did not allow to make any other call untill I gave it credit again. I have tried it on Version 4.5.0 , 5.1.3 and 5.2.4 but on all its giving me same error. I am really confused from last 3 days. Please help me.