ASP.Net Session inside the HTML frame

[Tapak]

Hi,

I am having a problem with the session inside the html frame. I created a
html frame and host it on (IIS 5.0) a different server where I host all my
aspx file (IIS 6.0). Every time, I view the html frame, the session of an
aspx file inside the frame will be lost and the page will generate an error.
However, this error will not happen when I open the page outside the html
frame.

In addition, if the html frame file is hosted on the same server, the
session on the aspx file will be opened without any error.

So, my questions are:
1. Is it possible the session is lost because the two different type of
servers (IIS5.0 vs IIS 6.0)?

2. Is there any suggestions to solve this issue without put the aspx file
outside the html frame?
Thanks.