Passive monitors have a payload limitation of 3 KB for WMI, SNMP, and Syslog Passive Monitors.
See Also
Troubleshooting and Maintenance
Troubleshooting your network
Maintaining the Database
Group Policy Object 503 Service Unavailable Error
Recovering from a "Version Mismatch" error
Task Tray Application fails on Windows Vista
Co-located SQL Server and WhatsUp Gold server clocks must be synchronized
Connecting to a remote desktop
WhatsUp Gold engine message
Troubleshooting SNMP and WMI connections
False negative returned from WMI monitors
Re-enabling the Telnet protocol handler
Receiving entries in the SNMP Trap Log
Recommended SMS modems and troubleshooting tips
Troubleshooting IIS configuration
Uninstalling Ipswitch WhatsUp Gold
Troubleshooting the WhatsUp Health Threshold