Hi Anyweb,
Many thanks for your reply, according below log, seem no GP policy for WSUS, because client can not get policy.
<![LOG[Failed to Add Update Source for WUAgent of type (2) and id ({C7941019-1F92-49F5-A177-06DB8784E818}). Error = 0x80040692.]LOG]!><time="11:42:26.977+000" date="07-19-2010" component="WUAHandler" context="" type="3" thread="3468" file="cwuahandler.cpp:2358">
<![LOG[its a WSUS Update Source type ({C7941019-1F92-49F5-A177-06DB8784E818}), adding it.]LOG]!><time="11:42:27.039+000" date="07-19-2010" component="WUAHandler" context="" type="1" thread="3468" file="sourcemanager.cpp:1348">
<![LOG[unable to read existing resultant WUA policy. Error = 0x80070002.]LOG]!><time="11:42:27.039+000" date="07-19-2010" component="WUAHandler" context="" type="2" thread="3468" file="sourcemanager.cpp:1026">
<![LOG[Enabling WUA Managed server policy to use server: http://*.com:80]LOG]!><time="11:42:27.039+000" date="07-19-2010" component="WUAHandler" context="" type="1" thread="3468" file="sourcemanager.cpp:1054">
<![LOG[Waiting for 2 mins for Group Policy to notify of WUA policy change...]LOG]!><time="11:42:27.071+000" date="07-19-2010" component="WUAHandler" context="" type="1" thread="3468" file="sourcemanager.cpp:1060">
<![LOG[Timed out waiting for Group Policy notification.]LOG]!><time="11:44:27.071+000" date="07-19-2010" component="WUAHandler" context="" type="1" thread="3468" file="sourcemanager.cpp:95">
<![LOG[unable to read existing WUA resultant policy. Error = 0x80070002.]LOG]!><time="11:44:27.071+000" date="07-19-2010" component="WUAHandler" context="" type="2" thread="3468" file="sourcemanager.cpp:1064">
<![LOG[Group policy settings were overwritten by a higher authority (Domain Controller) to: Server and Policy NOT CONFIGURED]LOG]!><time="11:44:27.071+000" date="07-19-2010" component="WUAHandler" context="" type="3" thread="3468" file="sourcemanager.cpp:1116">