Selecting from one set range to another

Hi,

So in my code I have two set ranges and want to select from one set range to another. The code I have now does not work because I cannot select Range("POBRF:PO"). This is the code. How do I fix it?

[CODE]
ARow = Range("A" & Rows.Count).End(xlUp).Row
Set POBRF = Range("A1:A" & ARow)
BRow = Range("I" & Rows.Count).End(xlUp).Row
Set PO = Range("I1:I" & BRow)
Range("POBRF:PO").Select
[CODE/]

Thanks,
Justin