URL Parameter group

Hi,

I have a software service that needs splitting on one of its URL because several pages are only distinctive by the parameter inside the URL:

http://domain.com/QvAJAXZfc/opendoc.htm?document=Production%2FAZURE%20Dashboard.qvw&host=QVS%40seskwmmprod
http://domain.com/QvAJAXZfc/opendoc.htm?document=Production%2FGlobal%20KPI%20Heat%20Map.qvw&host=QVS%40seskwmmprod
etc.

What I want is to split on the document parameter.
To do that I created a static monitored URL "http://domain.com/QvAJAXZfc/opendoc.htm" and specified a parameter in URL parameter groups.

I tried with document= and document, with or without urlencoding, with a regex monitored URL rather than a static one but all the traffic seems to always go to All other operation.

Did I miss something obvious here?

Regards,

Frédéric.