Web services is really a 1.0 version product. It never really worked that good in my opinion. SData is much better and is the product I believe Sage will be continuing development with since it is a Standard they have to communicate between their own products. Depending on what you wanted to do, something link
http://sage100.websitepipeline.com/synctool/ might have been a better option. Although it probably cost much more.
We created our own web services that is programmed specifically to what our customer wants and it simplifies what the web programmer needs to know and do. Most part, they post us a request and we respond with an xml result. We do all the heavy lifting. It isn't an out of the box solution.