I've changed my WebProxy log monitoring configuration to use SQL Server following all the steps that the ISA Help Content recommends. I've created the table as the script says, the DSN and the account to beginning monitorization. As I've not activity on my new SQL table, I've changed another time to log by .txt file and it's running normally. Also when make these changes, I can`t start the WebProxy Service and only when I disable the ISA Server WebProxy Service LOG, I can start the service and after this I can enable the log. Thank you.