In all the help for the database functions, the criteria always show the
values hard coded with a value like:

="=10"

I want to have a sum of a certain column where the date is within 2 dates I
have derived (using formulas) in two cells outside the database and criteria
range.

For example, I have a database in A1:D10 and the criteria is in F1:H2.
Column A is a column of numbers and column B is a column of dates. I have a
begin date calculated in J2 and an end date calculated in K2. Column F
matches column A and columns G and H both match column B so that I can do
multiple criteria on column B. How do I set the values of G2 and H2 so that
it basically says:

in G2 - Date in column B is = J2
in H2 - Date in column B is also <= K2

I've tried in G2 - ="=J2"
I've tried in H2 - ="<=K2"

My DSUM looks like ("Score" is column A):
=DSUM(A1:D10,"Score",F1:H2) but I get the error:

A values in this formula is of the wrong data type

I looked at the help for that error but I don't see what I'm doing wrong.
It doesn't seem like Excel will allow a cell reference in the Criteria
section. All the help examples are hard coded. How do I get a criteria to
refer to a cell's value instead of hard coding the criteria values?

Thanks,
George