vista and chat

hi i tried to get into a chat site xp worked with, with vista the site
suggestion is this

<<SYMPTOMS:

If, when loading the chat room, the blue loading bar appears for a very long
time, and the chat room applet never comes up, the following may help you to
immediately resolve the problem. This problem is also associated with very
slow page loading using Firefox, and slow eMail sending/retrieval using
Thunderbird.

The following solution applies to Windows Vista users only.


SOLUTION:

The Windows Vista TCP Stack has been re-written. The following solution
appears to correct many internet-related issues with Windows Vista, and seems
to resolve the problem. There should be no negative effects from performing
the following; but we have provided you with instructions for undoing this
should you feel it necessary.

Part I: Disable TCP Autotuning

Click the Start (Windows Logo) icon
Select 'All Programs'
Select 'Accessories'
Right-Click on 'Command Prompt'
Click 'Run as Administrator'
A dialog box will ask you to confirm. Click the 'Continue' button to proceed.
Type: netsh interface tcp set global autotuning=disabled
Press 'Enter'
The message 'Ok.' should appear.
Type: exit

Part II: Empty your Java Cache

Visit http://www.addonchat.com/demo.html
The Java icon will appear in your task icon list in the lower-right hand
corner of your screen
Right-click the Java (coffee-cup) icon and select 'Open Control Panel'
Under 'Temporary Internet Files', click 'Settings'
Click the 'Delete Files...' button
A window titled 'Delete Temporary Files' will appear. Make sure all options
are checked and click 'OK'
Click 'OK' to exit the 'Temporary File Settings' window.
Click 'OK' to exit the Java Control Panel

Part III: Empty your browser's cache

Clear your browser's cache. Visit
http://support.addoninteractive.com/...n=kb&article=2 for
complete instructions.
Shut down all instances of your web browser.

That's all. You may now try to load the chat applet. If you have any
questions regarding this procedure, please let us know.

This issue is likely to work itself out in the near future as future updates
of Windows Vista and Java are released to the public -- once these updates
have been released, your users will not be required to go through the above
procedure.>>

I did all this, page froze, and i got these details from fiefox (IE is worse)

Description:
A problem caused this program to stop interacting with Windows.

Problem signature:
Problem Event Name: AppHangB1
Application Name: firefox.exe
Application Version: 1.8.20070.25881
Application Timestamp: 46eb3036
Hang Signature: 54ab
Hang Type: 16900
OS Version: 6.0.6000.2.0.0.768.3
Locale ID: 2057
Additional Hang Signature 1: 22aeee138338df25f6f71b0aa1f78801
Additional Hang Signature 2: b6f6
Additional Hang Signature 3: 3df03d65a5b6a257891950fffdab95cf
Additional Hang Signature 4: 54ab
Additional Hang Signature 5: 22aeee138338df25f6f71b0aa1f78801
Additional Hang Signature 6: b6f6
Additional Hang Signature 7: 3df03d65a5b6a257891950fffdab95cf

sorry for all the cutting and pasting, but what does this mean, has anyone
an easy to follow solution?

thank you in anticipation of a response