[AXIS2] :Mismatched header type

[mark]

I have a IBM APP Server
when i send a web service call to the server, through HTTP Server
the header in the soap message returned is text/xml, which causes a SOAP 
Transport URI error at my client side.
What can be the reason for the application server to return text/xml in soap 
response. ?
The call is a SOAP 1.2 Call


Thanks