You need to submit a sample to Mcafee trough one of the submission methods so that they can create a detection for you.
For an example of submittion metods please see: http://vil.nai.com/vil/submit-sample.aspx
If you do have platinum support then i would use that.
Alternativly you can use Webimmune https://www.webimmune.net/default.asp to submit your sample.
Some things to consider:
Your sample needs to be zipped in a zip file with the password "infected" (Without the quotes)
You should not use the best encryption or zip method as Mcafee is not always able to read those. Use the "Compatible" options in winzip.
The zipped file must not be more than 5 MB or it will not be accepted.
If there are any others that have any more tip's then please feel free to step in :-)
McAfee detect virus pretty good but seem autorun file is not. With this, someone think McAfee is not good. I think McAfee should consider and improve to detect autorun virus.