Question : ISA 2006 problems

I have ISA server 2006 sp1 on windows 2003 sp2 working in Active directory Domain
having the errors
Kerberos Event ID 4 and Event ID 5719 Authentication failure ( tried to test with \\domain name\sysvol\domain name give logon failure)

puplished exchange server donot work ( out side users web logon or pop3 report that they cannot access the mail and keep asking about the password again and again all internal users have no problems working with MAPI and connected directly to exchange server) I think this problem related to the event ID 4 and 5719

All internal users can access internet without problem

all other servers have no problem related to Active directory domain controllers or member servers
 

Answer : ISA 2006 problems

I have solved this issue by deleting the isa computer account in ths active directory and rejoining again it solve this issue and still have one problem that the web based users cannot log in to exchange but POP3 users can without problem this is my problem now