Problem - ArcGIS Server 10 Web Adf .Net App hitting ArcGIS Server 10.1 map service

Discussion created by sfisher on Aug 16, 2012
Should applications built using the ArcGIS Server 10 Web ADF .Net runtime work fine when using ArcGIS Server 10.1 map services?  I would think since there is not much new development in this area the soap services at 10.1 would be fully backwards compatible
against the 10 runtime. 

Most things seem to work, however any queries I make (either spatial or using a sql where) are returning a null DataTable.  The same code works fine hitting a 9.3 or 10 map service, but always returns null against 10.1 map service.  Do I have to upgrade my app to
the latest 10.1 Web Adf runtime?