I have not used this binding before so I don't know if the following solutions will help or not.
First make sure that you are using the WCF Message Log rather than the WCF Trace.
Second, check the contents of the message log file. If the message log records are set to have a source like "ServiceLevelReceiveDatagram" or "ServiceLevelSendDatagram" replace those strings with "ServiceLevelReceiveRequest"
or "ServiceLevelSendRequest" respectively. This is a bug in the tool.