Authentication failed. The user credentials were not accepted by ISA Server.

[ulas]

Merhaba,
Localde bulunan Xp Pro Sp3 clienta FWC yazılımı kurulu dhcp+wpad ile konfigüre ettim.Web proxy authentication u requie all users to authenticate şeklinde ayarlayınca.FWC ile İsa Srv. bağlantısı kesiliyor ve client event ına bu hata düşüyor.
Application [svchost.exe]. Authentication failed. The user credentials were not accepted by ISA Server. Verify that the user account running this application has the required permissions.