Help me! IErrorInfo.GetDescription failed with E_FAIL(0x80004005)

Question

hi every body
here's my problem, m gettin this error(System.Data.OleDb.OleDbException: IErrorInfo.GetDescription failed with E_FAIL(0x80004005)) while using this query

strSQL="Select [s].[StudentID], [s].[StudentName], [r].[MaAvg], (Case When [r].[MaAvg]>=5 then 'pass' else 'fail' end) as 'ResultCol' From Student s, Result r where s.StudentID=r.StudentID";

Someone pls help me. Someone pls edit this query for me.

Thanks!