vCO 5.1 webservice through SOAP

I am unable access vCO webservices through SOAP protocol in Wavemaker.I get the premature end of file! error when i try using the following url;

http://vcoserver-ip-address:8280/vmware-vmo-webcontrol/webservice?WSDL.

Version of vCO : 5.1
Version of wavemaker : 6.5.2Release.

I have attached the screenshot of the error.
Can i get the solution for this.?