"Command has expired!" error message in pmw_server.log, user could not login and receive timeout error.

2007-06-01 15:12:14,609 DEBUG [http-443-Processor22] [] [PM-78C546917033-6499a8aa] [com.passmarksecurity.client.generic.ProtocolAdapterBase] - <Command has expired>
2007-06-01 15:12:14,609 ERROR [http-443-Processor22] [] [PM-78C546917033-6499a8aa] [com.passmarksecurity.client.generic.ProtocolAdapterBase] - <ProtocolAdapterBase failed: Command has expired!>
com.passmarksecurity.PassMarkException: Command has expired!
            at com.passmarksecurity.client.generic.ProtocolAdapterBase.handleClientRequest(ProtocolAdapterBase.java:213)
            at com.passmarksecurity.action.support.ActionUtil.initPmSession(ActionUtil.java:177)
            at com.passmarksecurity.action.SigninStartAction.doExecute(SigninStartAction.java:138)
.............

2007-06-01 15:12:14,609 ERROR [http-443-Processor22] [] [PM-78C546917033-6499a8aa] [com.passmarksecurity.action.support.PassMarkActionBase] -
<Invalid Message Couldn't interpret message - check logs>
com.passmarksecurity.action.support.ActionUtil$InvalidMsgException: Couldn't interpret message - check logs
            at com.passmarksecurity.action.support.ActionUtil.initPmSession(ActionUtil.java:183)
            at com.passmarksecurity.action.SigninStartAction.doExecute(SigninStartAction.java:138)
            at com.passmarksecurity.action.support.PassMarkActionBase.execute(PassMarkActionBase.java:197)
....................