trigger will not execute

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I have two similar triggers one on solodata table and one on components table.
I cannot get the trigger on solodata to execute. I have pasted it below.
Below that
I hve pasted the one on components that does run. i checked and extn5 does
change, and the groupid in solodata is 66, I would appreciate any help on why
this is not running.


CREATE TRIGGER [SDLineNo] ON [Solodata]
FOR INSERT, UPDATE
AS

IF UPDATE (ExtN5)
BEGIN

DECLARE @SDL INT
SELECT @SDL = SOLODATALINK FROM INSERTED

UPDATE SOLODATA
SET IsoText = ReportedLineNo
FROM Components CP inner join Solodata SD ON CP.solodatalink =
sd.solodatalink
inner join Commondata CD ON
CP.commondatalink = cd.commondatalink
WHERE sd.GroupID IN (1,6,17,28,51,52,53,55,62,66,67,68) AND sd.ExtN5=1
and SD.solodatalink = @SDL
END

**********THIS IS THE ONE THAT WORKS
CREATE TRIGGER [IsoTextLineNo] ON [Components]
FOR INSERT, UPDATE
AS

IF UPDATE(COMMONDATALINK)
BEGIN

UPDATE SOLODATA
set ISOTEXT =
REPORTEDLINENO + '$VENT/DRAIN/INST$/MD-110 DEG$SEE ' + COMPONENTDESCRIPTION
FROM inserted i inner join commondata cd on i.commondatalink =
cd.commondatalink, solodata, components
where solodata.groupid = 69
and solodata.SoloDataLink = Components.solodatalink
and Components.CommonDataLink = CD.CommonDataLink

--need to have the code below put on solodata table also for change in extn5
UPDATE SOLODATA
set ISOTEXT =
REPORTEDLINENO
FROM inserted i inner join commondata cd on i.commondatalink =
cd.commondatalink, solodata, components
where Solodata.GroupID IN (1,6,17,28,51,52,53,55,62,66,67,68) AND
Solodata.ExtN5=1
and solodata.SoloDataLink = Components.solodatalink
and Components.CommonDataLink = CD.CommonDataLink

END
.