A problem using array formula

Hello, I'm trying to use the array formulas of this post:
http://www.excelforum.com/showthread.php?t=644521
using Excel 2007, but it doesn't work. I don't know what could be happening.

I tried with the three formulas, but nothing.
I put the formula in the place indicated, and then I click with the cursor in the formula bar, and hold down Contrl+Shift, then Enter. Then it tells me an error, and indicate with black that some part of the formula is bad, like in :
=IF(COUNTIF(A$1:A1, A2) = 0, ROW() - 1, ROW() - MATCH(2, 1 / (A$1:A1=A2) ) ) - ROW($A$2) + 2
the "A1, A2" of the first part.

In the Mikerickson's Formula:
=ROW()-MAX(--($B$1:B1=B2)*ROW($B$1:B1))
it gives me an error of "circular reference"

I attached a worksheet with the three formulas.

Thank you for your help,
Caldera