No picture when playing cooking mama 3

Hello!I have problem and I thought that you guys might be able to tell me what is wrong and what to do about it.I have a R4 and I DL games from here. I recently downloaded Cooking mama 3. I had to replace the arm7.bin file in the game. Now when I turn that game on both screens are black. I can select things (although I have no clue what Im selecting) and the audio works fine ( I can here sounds when I randomly hit a button that I can't see).I wanted to know what I should do about this. Should I just download a different version of this game (like the European one) or is there something that I actually can do to fix this copy that I have?Thank you in advance for any help you guys are able to provide

If you aren't already, look into using Ysmenu
https://www.romulation.org/forum/index.php?topic=27617.0

Are you using the Real R4? I use the V1.24(beta) from R4 i.L.S.and it works fine. Update your kenerl by searching the one you are using below:
http://www.linfoxdomain.com/nintendo/ds/