There are some Notes in Metalink but they mention ADO or Visual Basic, and the solution are:
1.-set the 'Updateability' property to updateable
2.-cmd.Properties("IRowsetChange") = TRUE
3.-Rst.open "select ename,empno,job from scott.emp",con,adOpenStatic,adLockOptimistic,adcmdText

But my first thought was on a property on the ODBC DSN itself, maybe a Read-only checkbox
Hope it helps.