frequest disconnections

hi

Machine configuration : Intel PIII 1 GHz, 256 MB RAM

Windows XP Professional Edition, no servie pack.

Internet connection : My ADSL connection terminates on a
RedHat Linux 9.0 machine which has NAT configured.

I am using Hosted Terminal Access account of REUTERS for
accessing news and stock market information. It is a
secure connection (https, port 443).

My problem is, the REUTERS site gets disconnected
frequently, giving a message that "The Citrix Metaframe
Client cannot contact the server".

can anybody help with any settings to be done at my end as
I have already spoken to the Tech support at REUTERS?

thanks in advance

Kailash