Hi. for long time i m using isa server 2006 standard edition with win2003 service sp2 with AD/DHCP/DNS installed with Firewal Web Proxy Client. i have no problem in every thing. but after ForeFront release a problem occured in the Authentication. means i m makeing acount in my AD and creat browsing rule and allow brwsing just to All Authenticated and my own choiceable group so its shows the error to me. Error Code: 407 Proxy Authentication Required. The ISA Server requires authorization to fulfill the request. -Access to the Web Proxy service is denied. (12209)

plz can any one have any solution about it .. i m try to install SP1 of isa 2006 but that show me error and says my installer version is not patched or suported sp1 isa 2006 ..