Calling webservice on button click

Hi All,

I have created a interactive pdf form with execute button. On Click, It should invoke a web-service designed in livecycle workbench.

I have followed below steps:

• Created a simple form, Drag & Drop a button from Object Library
• Changed "Control Type" to Execute
• In Execute tab, created New Data Connection with required details and selected invoke operation.
• Saved the form as PDF and applied Usage Rights.

On clicing button, below error is displaying:

          "Could not post data to ."

I tried the click event with Designer Preview, Adobe Reader and Acrobat Pro, But could not get any difference

I am able to call same web-service from another workbench process (Using Invoke Web-service operation)

Please suggest how to call webservice from pdf on clicking button

Thanks in advance,

Ramu