I downloaded 1) "adult_male_genitalia.proxy" 2) "adult_male_genitalia.obj" 3)"adult_male_genitalia.thumb" from
http://www.makehumancommunity.org/proxy/adult_male_genitalia_by_manuel_bastioni.html. Then I put all three files in "MakeHuman/data/proxymeshes" directory in their own folder called, "Adult Male Genitalia."
Then, I opened MH, and created a male using the "Main" tab. Then I clicked the "Gender" tab. If I had made a female, I'm able to change the size and shape of the breasts. However, upon creating a male, the sliders for changing size and shape of male genitalia do not move. They are frozen, and no genitalia appears on the male. This is what I mean when I say, the proxy is "not working." I tried this procedure with MH v.1.0.1. and MH v.1.1.0 with same results.
Please let me know if I can provide any additional info. Thanks for your help!