OD/DD RPC protocol stream is incorrect

System

Just moved over to TS6.7.1, OD 6.1 and SQLServer2005 and I'm now gettin this error on certain deployments -
DBD: *******************************************************
DBD: SQLException occured in TDbSchemaGroupCfg
DBD: Exception Message: [STH008DB]The incoming tabular data stream (TDS) remote procedure call (RPC) protocol stream is incorrect. Parameter 8 (""): Data type 0x32 is unknown.
DBD: Vendor Error Code: 8009
DBD: SQL state: 01000
DBD: *******************************************************

Anyone know whats wrong ?

Thanks

/Nick