WSDL not recognized for web service

Hi Team,

I am trying to import the below 3rd party wsdl in SOAPUI. But it throws out an error. Could some one help me in fixing this.

https://ws3.ondemand.qas.com/ProOnDemand/V3/ProOnDemandService.asmx?wsdl

I have tried the below approach, but no result.

1. Importing the wsdl in SOAPUI.
2. Opened the wsdl in a browser and saved as a New XML file and tried Importing the file in SOAPUI.
3. I exported a certificate from the browser and added to the ketstroke in SOAUI, and imported the wsdl, still it did not work.

Thanks

Senthil kumar. M