Page cannot display error with Internet Explorer

[KZBTZ]

I've been having issues setting up my Apache web server with Zen Cart. I've tried with previous versions and a fresh install to no avail. The last version I've tried and the version I am using right now is the latest (of everything basically) together, you can check the specs below.

Even trying to go to the "phpinfo.php" page on my site, it breaks up in Internet Explorer 6 while it's loading. It seems like the page will appear for just a second and then will disappear and display "Cannot find server / Page cannot be displayed". In any case it will partially load or fail. This does not happen when I access the server locally, it magically appears fast and fine. I've tried this with 2 different computers with no change from the instability.. It's like sometimes it will work and sometimes it won't and will break the code, but depending how much you refresh, around 87% of the time nothing will appear or it will display "Cannot find server".

For testing purposes, you can reach the site at:
http://vrtl.ath.cx/

This is working straight from my DSL connection to the internet, there is no router involved and I don't have any bandwidth intensive applications running while I run the server.

I am running a custom built home computer:
Windows XP Home Edition SP2
2.41Ghz Pentium 4
1GB DDR RAM
40GB Hard Drive
AT&T Pro DSL Service (3.0mbps)
Siemens Speedstream 4100 DSL Modem

Apache/02.2.6 (win32) mod_ssl/2.2.6 OpenSSL/0.9.8e PHP/5.2.5
I also use DynDNS with the Inadyn DNS updater as a windows service which seems to be operational and perfectly fine..

Even though I have no problems browsing the net from my own computer or using it to share files or normal html pages, I thought it would at least be able to handle this..

I've tried this a few times even with my own configured shop code, but even the test is acting up. I'm running this out of my DSL connection. I'm starting to think that the connection might be the problem, even though I run a torrent program and transfer pretty much with no problems. I would like your advice on all this since I really would've liked to run the server from my home connection and manage all the information and technicalities myself, but if push comes to shove I will look up for some web space from some provider. Thank you.

[KZBTZ]

Solution found.

Upgraded Windows to XP Professional SP2 and now it works fine, but slow. No code breaks so far!