You have to put the extra condition before the overall closing
parenthesis:

Code:
--------------------

=SUMPRODUCT(--('Enroll I'!A$2:$A$2921=$B17),--('Enroll
I'!$O$2:$O$2921="NSITE0"),--('Enroll I'!M$2:$M$2921="Yes"),--('Enroll
I'!N$2:$N$2921="Yes"),--('Enroll I'!P$2:$P$2921="Regular"))
--------------------


--
NBVC

Where there is a will there are many ways.
'The Code Cage' (http;//www.thecodecage.com)
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