[reSIProcate] Problem with respect to Tag field

[sumit]

Hi All

There is a very strange problem that I am facing now.
When I am framing the messages say invite and bye in that case what I am 
finding is that the tag is not set properly on the TO side.In the Invite 
message where  the  tag is not  to be present I am finding the Tag is 
present with the tag field (TO) in the message set to SIP tag : udp >  
(On analysing with ethereal capture)
In a similar way when I am framing the bye message too I am coming 
across the problem where I am finding
SIP tag : udp > in the TO field of the SIP message.
The fields which I am setting and then constructing are given below for 
a better understanding

 char *proto ="udp";
 NameAddr target
 target.uri().scheme() = "sip";
 target.uri().user() = "sumit";
 target.uri().host()="192.168.115.33";
 target.uri().port() = 5060;
 target.uri().param(p_transport) = proto;

 NameAddr contact;
 contact.uri().host() = "192.168.115.41";
 contact.uri().port() = 5060;
 contact.uri().user() = "sumit";

  auto_ptr<SipMessage> message(Helper::makeRequest( target, contact, BYE));
  mStack.send(*message);

If anyone has come across a similar problem can you let me know what is 
to be done as observing the same problem whenever I am constructing a 
message using the Helper class.Is there any other method the messages 
can be constructed.

An early response will be really beneficial.

Regards
Sumit