Brian... how would I know what your name is from your posts :-). I'll try to remember your name is Brian but this forum name business drives me batty...
As for accelerators, please explain what the extra entries below the closing markers are? after </accelerators>:
Are these invalid keystrokes that do nothing functionally in the resource file.... very puzzling XML structure to a guy who's trying to decipher it.
</ACCELERATORS>
<!-- Play/Pause -->
<Entry Key="Space" Command="10000" Param="0" TranslateFlags="21" />
<!-- Next and Previous track -->
<Entry Key="Ctrl;Right" Command="10003" Param="0" TranslateFlags="21" />
<Entry Key="Ctrl;Left" Command="10004" Param="0" TranslateFlags="21" />
<!-- Show Now Playing -->
<Entry Key="Ctrl;N" Command="10013" Param="1" />
<!-- Ratings Commands with Alt/Option 0 to clear 1 through 5 to rate -->
<Entry Key="Alt;0" Command="10023" Param="0" />
<Entry Key="Alt;1" Command="10023" Param="1" />
<Entry Key="Alt;2" Command="10023" Param="2" />
<Entry Key="Alt;3" Command="10023" Param="3" />
<Entry Key="Alt;4" Command="10023" Param="4" />
<Entry Key="Alt;5" Command="10023" Param="5" />
<!-- Volume Up and Down 5% -->
<Entry Key="Ctrl;Up" Command="10018" Param="1" />
<Entry Key="Ctrl;Down" Command="10019" Param="1" />
</MJRS>
Accelerators is MC's code word for "hot keys". As in, they "accelerate" your use of the program because hot keys are faster than mouse clicks on menus. So all keyboard mappings (the <entry Key.... > stuff) have to be between <accelerators> and </accelerators> markers. Those are the opening and closing tags for that section of the file. If you put <entry key> *outside* of that section, MC doesn't know what to do with it.
You have now moved your key definition to the correct part of the file so MC would know how to handle it.
BTW, you're the only other person that's called me Big Entry based on my forum name. You don't live in Thailand do you? (Joking. That's where the other guy lives.)
Brian.