Harvest Moon DS + YSmenu on non fake r4

I've been playing this with my niece recently (she has an r4 as well) and for some reason no whenever I try to load my save, the game freezes.
This doesn't happen to my niece and she was up to the exact same part as me.
Will I have to start again or is it my Rom/Save file ?Also I have a real R4 and want to be able to boot YSMenu as a seperate program because when I used it as my main firmware alot of games messed up, is it possible?

Backup and delete the save-file. Yes it is possible, you can use something like a2h's YSMenu Generator to build a copy of YSMenu which can be booted through the file-browser, so you have 2 firmwares :)

Replying to #2

what do you mean?
It's really annoying, I go to "load diary 1" and the music stops playing and the game freezes D:Also, thanks for the advice on ysmenu, it's working good so far :D