Webservice data adapter not working in a subdataset

I have a report where in I am using a webservice in sub dataset and have a pulled a table element out of this. However, I am unable to run the report.

It requires me to define the follwoing in the main data set, which I have.

• uriKeyauth
• TypeKey
• authParametersKey
• languageKey
• verbKey

It throws an error Verb should be POST or GET . is not a valid verb

How do I connect the maindataset to the webservice subdataset?

Thanks