Copy Down & Auto increment formula

[NeoSez]

I hav a spreadhset with columns of different formulas similar to this formula

=IFERROR(__xludf.DUMMYFUNCTION("GoogleFinance($A2+1)"),52.4)

The problem is when I copy the formulas down, the $A2 should be changing to $A3, $A4, $A5 etcetera. I tried dragging it down, Goto and none of it is working. I don't want to manually change this for hundreds of rows and cells and columns.
How do I get the cell reference to change?

 

[Yongle]

Try

=IFERROR(__xludf.DUMMYFUNCTION("GoogleFinance(" &$A2& "+1)"),52.4)

 

[NeoSez]

Try

=IFERROR(__xludf.DUMMYFUNCTION("GoogleFinance(" &$A2& "+1)"),52.4)

Thank you Yongle
I had tried the formula as

=IFERROR(__xludf.DUMMYFUNCTION("GoogleFinance(" &$A2&+1)),52.4)

but it failed. Those "" get me every time.