I cannot use the keyboard shortcut <ctrl>+<alt>+<enter> in matlab running in emacs running in screen

In my usual setup, I use use matlab-emacs to run Matlab through the Emacs GUI. I run Matlab and emacs on a Linux server, and use ssh and X forwarding so this all shows up on my local Ubuntu laptop. I would like to further complicate this setup by running emacs in screen. This mostly works with the notable exception that the keyboard shortcut Ctrl+Alt+Enter which tells Matlab to run a block of code, doesn't seem to do anything. I presume this shortcut is getting sent perhaps somewhere locally on my own machine? I notice the menu bar at the top of my terminal on my laptop changes when I try to run this command. Does anyone have a clever suggestion for how I can get Ctrl+Alt+Enter to run Matlab code blocks as expected?