class does not support automation or does not support expected interface 錯誤,该如何处理

class does not support automation or does not support expected interface 錯誤
   If bPAccess Then
        strSQL = "select appr_status,BATCH_NO,REF_NO,ITEM_NO,ITEM_DESCE,oms_itemno,ITEM_GRP,MODEL_NO,CUST_PN, REV, " & _
                "MANU_NAME,MANU_PN,PROCUR,SPEC_PROCU,UOM,NET_W,NET_UNIT,CUST_CODE,Safe_Mat,mold_code, " & _
                "material_type,factory_code,item1,item2,item3,item4,item5,item6,item7,item8 ,i_date,by_user,export_fg, conrohs = case itemmstr.rohs when 1 then 'ROHSR0' when 2 then 'ROHSR1' when 3 then 'ROHSR2' when 4 then 'ROHSRE' else '' end,suggest_itemno,batchmgt from itemmstr where rtrim(ltrim(appr_status))='P' order by ref_no"

   Else
       strSQL = "select appr_status,BATCH_NO,REF_NO,ITEM_NO,ITEM_DESCE,oms_itemno,ITEM_GRP,MODEL_NO,CUST_PN, REV, " & _
                "MANU_NAME,MANU_PN,PROCUR,SPEC_PROCU,UOM,NET_W,NET_UNIT,CUST_CODE,Safe_Mat,mold_code, " & _
                "material_type,factory_code,item1,item2,item3,item4,item5,item6,item7,item8 ,i_date,by_user,export_fg, conrohs = case itemmstr.rohs when 1 then 'ROHSR0' when 2 then 'ROHSR1' when 3 then 'ROHSR2' when 4 then 'ROHSRE' else '' end,suggest_itemno,batchmgt from itemmstr where left(batch_no, " & i & ")='" & strPUser & "' and rtrim(ltrim(appr_status)) <> 'A' order by ref_no ,item_no "

   End If


  rs.Open strSQL, cn, adOpenStatic, adLockReadOnly
  
  Set DBGrid1.DataSource = rs


运行时提示   Set DBGrid1.DataSource = rs 出现标题错误！
了解的棒棒忙谢谢！！！


------解决方案--------------------

DBGrid 不支持 ADO，换 DataGrid 就好。

或者换用 DAO 的 recordset.