Hello All, I am having a strange problem with my ISA server, sometimes all the users can't open and web pages (Host not found) and I have to restart the ISA so everything can work. I checked the Event viewer and I found to errors repeated with every restart (They are repeated rapidly, almost 15 times per hour), the First one (After each restart) is the 14146 (ISA Server failed to load Web server dll........etc) and the second error is repeated all the way, 14120 (Can't create a packed filter for x.x.x.x), this IP is our Exchange server so no internal users are not receiving and mails from outside !!!! Please advice. Thanks in advance. Ahmed