Malwarebytes anti-malware/mbam.exe

My AVG anti-virus free edition 2011 says this is a trojan horse back door,I am not sure if this false alarm or genuine,but the avg won't allow me to run this if I try to download the programme as it says this is a trojan.
(Someone has told me it is a false positive,I have also written an email to avg.com)

I wonder if MM are aware of the problem.