Can't Creat a Performance log alerter

Start the Performance Logs and Alerts service by using the Local System account instead of the Network Service account:

1. Click Start, click Run, type services.msc in the Open box, and then click OK.
2. In the Name list, double-click Performance Logs and Alerts.
3. Click the Log On tab, click Local System account, click Apply, and then click OK.
4. Quit the Services dialog box, and then restart the ISA Server performance counter log.