Windows event log messages do not display correctly if the message queue coded character set identifier (CCSID) is set to *HEX (65535). If you get unreadable messages in the server message queue (identified by the MSGQ parameter of the NWSD), take the following action.
For example, if the message queue name is MYSVRQ in library MYLIB, then you can use the following command on i5/OS to change the message queue CCSID: CHGMSGQ MSGQ(MYLIB/MYSVRQ) CCSID(*MSG).