Cannot set Update Server to default
I have tried using "sudo defaults delete /Library/Preferences/com.apple.SoftwareUpdate CatalogURL" to set my update server back to defaults, but that setting is not set. My computer used to be managed by Casper and apparently they configured it to look to an corporate run updates server. Not that I'm off the corporate network, I can't seem to get updates to look to Apple's site. Suggestions?
Mac mini, Mac OS X (10.6.8), Originally managed by casper