got an email saying I have a Private Message, after logon, account says I have "0" messages..help

I sent a question to a member regarding a bulge hood for a 68 Dart GT and I was waiting for a response. Seems I got one on April 20, but have been unable to retrieve it. Also says I have no message history at all and I can't find his listing.

Any ideas on how to see any of them (new or old messages?)

Thanks for the help
-Shawn