[squid-users] Acceleratiion for a NTLM Auth Required Host

Dears
 I tried to use squid for acceleration for a website that needs to
authenticate it's client using NTLM Authentication.
 The problem is, when I use it to access that website it shows me the
IIS Authentication Failure Page.
 Why it does not forward the authentication request to my IE, client,
that comes from the webserver/IIS?
 Any Clue?

TIA
Best Regards

--
Mehdi Sarmadi