Ok, this is a longshot. I have been pondering this for hours. I have no clue how to solve this. But maybe someone here can recognize the problem and point me to right direction.

I have an IIS 7.5 server and a MSSQL database on a different server. On the IIS server there is a webservice that communicates with the MSSQL server.

The problem is that when there is data that the MSSQL server needs to send back to the webservice and the webservice delivers that back to the webbrowser (JSON) i get a 400 error. Looking through the logs for the IIS there is just a 400....nothing more. When i put in a call to the service in my browsers URL field i get this: "The server encountered an error processing the request. Please see the service help page for constructing valid requests to the service."

There is NOTHING wrong with how i call the webservice. It has worked before on a different server (a dev server).

Do someone have a clue on what this can be about? 400 means malformed URL...it isn´t. And why is that when there are no data to return to the user...everything works. But when there is data fetched from the MSSQL DB...the 400 error shows up.

Hope someone have some tips how to solve it. Thanx in advance.