R4 sdhc problem

I put R4 SDHC into my console (which had previously been working fine) and cant seem to access the game menu. After inital loading message, I am taken to normal screen where icons for game, multimedia and boot directory are shown. Seem to be going in through multi-media and getting onscreen message saying 'cant find file of _DS_MSHL.NDS in the SD?TF root directory'
I cross compared with another SDHC and all system, DAT files, etc are exact same - cant figure out how to solve this issue. Can anyone help??

Reinstall moonshell on your DS. If you want, I can send you an exact copy of my R4 SDHC pack that works fine.