web site goes slow and times out

[klawson]

There are a few web sites which our company has to access that at a certain point (usually a two way communication eg entering login info or uploading a small file) where the blue bar line goes very slow until eventually it gets the timeout message. If I use ie5.5 from the machine isa is loaded on and point ie5.5 through a proxy server (itself) it gets the error (note the error occurs from any pc that points to the isa server, I used the same server to prove the dns settings). If I point straight through our firewall (isa is only used so we can piggy back websense off it) it works with no problems. I have disabled websense so the problem is definitely with isa.

Any ideas ? Did anyone understand the above ?

Thanks

Kevin