Issue of trigger for datetime column - sql-server-2008

Question

I am using an Insert trigger on a table where I copy one record from one table to another.
Everything is ok. It works fine except on datetime columns. When I add a datetime column into the inserted values, then I get an error:
Invalid column name
My code is
ALTER TRIGGER [dbo].[Insert_MoinitoringBasic]
ON [dbo].[M0_BasicInfo]
FOR INSERT
AS
BEGIN
MERGE [MonitoringROSCII].[dbo].[MonitorBasicInfo] AS d
USING (SELECT DistrictID, upazilaID, LC_ID, AcademicYear, Trimester, RepID,
CASE VisitType
WHEN 'Initial validation' THEN 1
WHEN 'Full validation' THEN 2
WHEN 'Compliance monitoring' THEN 3
END AS VisitTp
FROM INSERTED) AS s ON s.DistrictID = d.DistrictID
AND s.upazilaID = d.upazilaID
AND s.LC_ID = d.LCID
AND s.AcademicYear = d.LCVisitYr
AND s.Trimester = d.Trimister
AND s.RepID = d.MOID
AND s.VisitTp = d.VisitType
WHEN MATCHED THEN
UPDATE
SET DistrictID = S.DistrictID
WHEN NOT MATCHED THEN
INSERT (DistrictID, UpazilaID, LCID, VisitType, LCVisitYr, Trimister, MOID,
LCStatus, IfCloseWhy, OthersSpecify,LC1stVstDt)
VALUES (DistrictID, UpazilaID, Lc_ID, VisitTp, AcademicYear, Trimester, RepId,
2, 'No', 'No', FirstVisitDate);
END
Here the last line FirstVisitDate which is a datetime column. Without this column, it worked nice but when I include this column, it shows the error mentioned above.
Can anybody help me with this?
Thanks

Answer 1

As the error text suggests, you are refering to a column that does not exist.
In the SELECT part of your MERGE statement, there is no output column named FirstVisitDate, which is why you're getting the error...