idoubs can not make calls with asterisk realtime

Hi Guys, I have an asterisk server on which I can make call with xlite zoiper etc. There is a strange issue that when I use idoubs to make calls it registers fine but can not make outgoing calls the screen keep showing calling but no call is made. The above issue only comes if the user is in database i.e using asterisk-realtime if I define the user in [login to view URL] it works well. Incoming calls working fine without any issue. let me know if any of you can fix this. I do not know if this is an issue with application or the asterisk server config.