IE6 - RTE problem

I am running Forum version 7.8 and as soon as I installed IE 6 and tried to post a reply I get the error below. The thing is that I can write a new topic without a problem but as soon as I press 'post reply' button on the RTE I get this this error message.

---------
Line: 395
Char: 1
Error: document.frmAddMessage.message is null or not an object
Code: 0
URL: http://localhost/forum_posts.asp?TID=239&PN=1
---------
Another thing is that I don't get these errors in Firefox at all, I think its something to do with IE 6,

please help...
Thanks

try re downloading the files, it seems a error, make sure all files are in correct folders also.

I manage to resolve the probelm by specifying 'post reply' button's event in the RTE_message_form_inc.asp like this :
OnClick=""document.forms(0).message.value = " & strGetMessageBoxHTML &

error is gone however the problem is of replying to the post is still there ...

When the new topic is created it works fine because it is using the file
post_message_form.asp but when the topic is replied to, the forum uses forum_posts.asp. First I thought that its the file (forum_posts.asp) but the thing is both of the files (forum_posts.asp & post_message_form.asp) use RTE_message_form_inc.asp, one is working and the other one it not.
When the 'Preview message' button is pressed (forum_posts.asp), it  displays the error "There is nothing to preview".

Is anyone else is having the same problem .. I was reading an article from microsoft about <iframe> in the IE6, I wonder if its got something to do with that.
http://www.microsoft.com/downloads/details.aspx?familyid=5437f94d-899f-425c-b2a4-893ba3a16d71& isplaylang=en&displaylang=en

Can someone please help...
Thanks
JAK

me too if i post a reply to  I get the error below. whit  IE 6,   Web Wiz Forums Support