You are probably getting some html that looks something like this:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN"
"http://www.w3.org/TR/html4/frameset.dtd">
<HTML>
<HEAD>
<TITLE>A simple frameset document</TITLE>
</HEAD>
<FRAMESET cols="20%, 80%">
<FRAMESET rows="100, 200">
<FRAME src="contents_of_frame1.html">
<FRAME src="contents_of_frame2.gif">
</FRAMESET>
<FRAME src="contents_of_frame3.html">
<NOFRAMES>
<p>This page uses frames, but your browser doesn't support them. Sorry!</p>
</NOFRAMES>
</FRAMESET>
</HTML>
(although your frameset and frame tags will amost certainly be different)
What you will need to do is parse out the <FRAME> tag src elements and fetch those pages instead.
e.g. if the home page is http://mysite.com/index.html and the frame tag is <FRAME src="frame1.html">, you will need to fetch http://mysite.com/frame1.html
Shaun
