I have noticed now that if a client is hibernated and then woken up in a new site the Task agent still tries to connect to the old site server. Is some cases, this site server may nolonger be availabe from the new subnet. The agent should be monitoring the current IP of the computer and if the subnet changes, it should evaluate if it also needs to change site servers. Currently my only work around is to restart the agent or manually click "Reset Agent" on the task tab.