Holger was spot on as always 
Looking back through the archives (for 8.2.2), it looks like the following was in the 8.2 supported RDBMS list.
Officially supported was:
- Oracle 11g (R1/R2)
- DB2 9.7 LUW
- SQL Server 2005/2008 and 2012
For SQL Server 2012 support you have to upgrade DataDirect Connect JDBC Driver 4.2 to 5.0 by applying fix SCG_8.2_SP2_DataDirect5.0_Fix1 which can be downloaded via "Software AG Update Manager.
Oracle was also supported when implemented as RAC.
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