HTTP Error 414 when accessing HTTPS

[Guest_imported]

We are getting this error when posting a request with a large form. The error, however, disappears when we take out the S in HTTPS. An unresolved thread in microsoft.public.isa newsgroup says that the problem might be in ISA.

Help?

http://groups.google.com/groups?q=e....0203050157.5daefb7@posting.google.com&rnum=1

Thanks!