Usedrange Property

macros in excel XP.

I written up a marco code to do series of calculations for me. I have one program that will use different matrix size (say 5 rows by 5 colums for one set of calcuations and open up another, but with 105 rows and 35 columns)

Now,
the way it works is the user input data in row 1 and column 1 and the marco does the following codes-

Dim numrows As Integer
Dim numcols As Integer

numrows=worksheets("template").usedrange.rows.count
numcols=worksheets("template").usedrange.columsn.count

thisworkbook. names.add "matrix",,,,,,,,"=!r2c2:r" & numrows & "c" & numcols

this code defines my range that will be used in the formulas further down the code.

the problem is that I test ran the code using the matrix=b2:ai105
and I was using the code for a run with matrix=b2:q77

but the code is giving me the range from the previous macro run (ie. b2:ai105) and want it to use the matrix based on new data size (say b2:q77).

I tried using activesheet.usedrange into the macro, but it does not work.

Basically I need to "reset" usedrange property so it uses the correct range every time.