Unknown HTTP version

Hi,

I used to have SoapUI 2.0.2 , it can call our web server with no problem.
But with SoapUI Pro 2.5.1, every call I got a response like
"Unknown HTTP version".

This is the excerpt from the request header,
"POST http://localhost:6070/imagenow/services ... ss_service HTTP/0.9
Content-Type: text/xml;charset=UTF-8
SOAPAction: "urn:#ACCESS_SESSION_BEGIN_USING_PASSWORD"
User-Agent: Jakarta Commons-HttpClient/3.1
Host: localhost:6070
Content-Length: 723"

Is there anything wrong here? Or where should I look?

Thanks, Helen