URL Webservice not static

Hi,

while configuring a webservice i dont want to enter a static URL. At the moment the URL is sent when creating a list element in SharePoint (properry of the element).

The problem is now: While configuration of the workflow the variable (WSURL) is of course empty, so I cant select the method and set the paramters.

Do you have an idea, how I can solve this problem?

Thanks!