DelayedRetry getting appended to call files

Hi All,
I am using Asterisk 1.4.17 release for the purpose of sending outbound calls. As a result of which I am making call files in directory “/var/spool/asterisk/outgoing” so that asterisk can make outbound calls. However, I have witnessed that after some time no outbound call is made by asterisk though call-files are present in “/var/spool/asterisk/outgoing/” directory.

It was observed that Asterisk is appending “Delayed Retry” again and again to each of remaining call files in
"/var/spool/asterisk/outgoing/" directory and no further outbound call is made.

I gave following command on asterisk console
"core show channels"
and result of this command showed “active channels” equal to number of call-files present in “/var/spool/asterisk/outgoing/” directory.Since I am making outbound calls using SIP I also gave the following commnad
"sip show channels"
but result of this command showed value of “active SIP dialogs” as 0 where it should have to be equal to number of "active channels"
since we are making outbound calls over SIP channels only.

So hereby I urge to help me in this regard as this issue has become blocking. I will be glad to receive reply on this ASAP.

Shivam Agarwal