R4DS- Moonshell won't read. Please help

The R4 came in today and I've downloaded the 1.13 firmware and installed it instead of the 1.11 it came with. The games load and play perfectly. Then I pressed the middle Icon (multimedia) and moonshell had a reading error. But thats all the info I got from the msg given.I am using a 512mb microsd, 1.13 firmware.444mb used on the card including firmware.Let me know what I can do to fix this problem. I seriously thought this was the easiest flash cart in terms of getting it to work but I am definitely having issues with moonshell.

find the file "_DS_MSHL.nds" and rename it as "MoonShell_R4TF_M3Simply-R4DS (MicroSD Card).nds" (that's the original name of the .nds file)optional, get your favourite app or game and rename that as "_DS_MSHL.nds" and see if that wil boot if you hit the multimedia button.