Filtering a data access page subpage in a frame in Access 2003

[billiejoefanclub]

I have 3 pages, 2 of which are in a frame.
In page 1, I have a button which after the user clicks opens the frame in which page 2 should be filtered based on a selection in page 1. I am passing the value through the serverfilter like so:

<SCRIPT language=vbscript event=onclick for=btnEditDPOW>
<!--
dim Loc
dim Ser
Loc = "BPFRAME_DPOW.htm?serverfilter="
'NEED TO SERVER FILTER SUBPAGE IN FRAME????!!!!!
Ser = chr(34) & "Third_Tier_ID=" & Third_Tier_ID.value & chr(34)
Loc = Loc & Ser

window.open loc,"","maximized=yes"

-->
</SCRIPT>

However the problem is that I am passing the filter into the frame rather than page 2 and therefore nothing is being filtered. I can pass this serverfilter into page 2 by itself but then I do not know how to open that in the frame as it is opening by itself.
So what I need to know is how to pass a serverfilter into a particular subpage in a frame.
Thanks greatly in advance.