Error while calling webservice

I am facing an issue while calling a Webservice with WM connector …if i try with same data from SOAPUI it is working fine …error i m getting is :

Message: The server you are trying to access is either busy or experiencing difficulties. Please close the Web browser, open a new browser window, and try logging in again.[11:55:25]

Kindly help…

Double check the address that your web service connector is using. The fact that you are getting HTML in the response suggests that you might not be posting to a service endpoint.