Access (2010) Query Conditional Set statement

UPDATE tbl_Plans
SET DocTypeNo = (CASE
WHEN ProtoTypeInd = TRUE THEN 2
WHEN VSType = "K"   Then 3
WHEN VSType = "B"   Then 3
WHEN VSType = "P"   Then 4

For the above query. What am I doing wrong?
Chuck LoweAsked:
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Rey Obrero (Capricorn1)Commented:
first, that is not an acceptable query syntax in access.
in access you can write this like this

update tbl_plans
set DocTypeNo= iif([ProtoTypeInd] = TRUE, 2
, iif([VSType] in ("K","B") ,3
, iif([VSType] ="P", 4, 1)))

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Chuck LoweAuthor Commented:
Thanks. I'm still in T-Sql mode.
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