Copying cell formulas
 

Excel 2003 ...
I have a cell formula for sheet 2 of an excel spreadsheet that is for row 1
"=Cu!A1+Cu!A2+Cu!B1+Cu!B2", where A1, A2, B1 & B2 are numbers from sheet 1
(renamed Cu); and
The formula for row 2 of sheet 2 needs to be "=Cu!A3+Cu!A4+Cu!B3+Cu!B4".

If I copy the formula for row 1 and paste it into row 2, the formula shows
as: "=Cu!A2+Cu!A3+Cu!B2+Cu!B3" -- which is not correct.

Short of deleting every other line (which would be rather tedious as I have
140 rows and as many columns), anybody have any suggestions for formatting
the formula. HELP ... the worksheets need completed by tomorrow.