Error with config System Command

Error with config System Command

Dear support ,
I using system command for log information , it's running version 8722 ok , but when i update to 8723 , it's have problem $DeviceField(ipAddress) can't display as IP Address 

2/28/2011 5:19:56 PM $DeviceField(ipAddress) Device not responding: Probably down or busy
2/28/2011 6:51:49 PM $DeviceField(ipAddress) Device Active and Responding

Plz fix this problem . Thanks !

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