E-newsletter custom template doesn't work

Hi, how are you? I've the following question: I updated to e-newsletter, and latest version of Wordpress.
The plugin is working, but i can't get my custom template working.

Yes i've read the manual and also lots of posts in the forum. And i think i tried to do as instructed, but the template is not showing up in the editor.

It's a multi site environment and i placed the files in the /blogs.dir/8/files/enewsletter-custom-themes/MyTheme

If you could help me out i would be really great full.