I have a workbook with two active sheets. The second contains data and I
want to use the first for summary information. The data is basically dates
(in column A) and numbers in the other columns. Based on some of the other
questions and answers here, I wrote the formula:

=SUMPRODUCT(((MONTH('Issue Detail'!$A3:$A275)=7)))*('Issue Detail'!$B3:$B275).

Issue detail is the name of the second sheet; 7 is July; A3:A275 is the
column of dates (formatted as 07/03/06, etc.); and B3:B275 is one of the
columns of numbers.

Although the formula seemingly has no errors, The only result I am getting
is 0.

I have been reading this forum for suggestions & guidance and, in advance, I
want to say thanks for the past help.