Sending DTMF after Voice Call in WML

Hello,
I am using WMLScript to initiate a voice call in WAP 2.0. After the call is answered, I need to send DTMF with a 4 digit counter value suffixed by a '#';

WMLScript.WTAPublic,makeCall(“+18661212121”);
WMLScript.WTAPublic.sendDTMF(“<Counter_Value>#”);

For some reason the call initiates and I answer the call but the DTMF code/sound does not come. I started reading about it in WAP Forum Specs and found that there are two types of WTAI
a) Public
b) Network Specific
The Public is BLOCKING call as listed above
The non blocking is like
WTAVoiceCall.setup("+1866121212");
WTAVoiceCall.sendDTMF("1234#");


Neither of above codes are working. Can someone who has successfully done this throw some light or advise. I will truly appreciate it. If I find the answer myself. I will post it for the benefit of all.

Best Regards
-bharat
(E-Mail address blocked: See forum rules)