DeSmuMe launch OK but goes to black screen?

Hello,

I am having a little trouble with DeSmuMe. I do have it working outside of Gameex with no issues. It also seems to be launching ok from Gameex with the default command line except it launches into a black screen with DeSmuMe running underneath. I know it's running because I have sound and can click buttons to navigate forward in the game, I just can't see anything except a black screen.

I read some threads here and thought it might be a fullscreen issue so in the advanced config I put a send keys for alt+enter for the desmume fullsreen command. 

That did not work. I'm probably missing something stupidly obvious... 

desmume ini file attached. can't figure out how to export the text from it on my mac here at work though but I can when I get home later.

Thanks in advance for any help!

-Mal