Imagine My Boutique freezes?

When I am done with mission 9 (the one were Alex wants to leave) the bottom gets black and nothing happens.. anyone else got that problem?I tried 4 times now and it happens there all the time, right after Ive talked with the mayor

Make sure you have the latest firmware for your card.
www.linfoxdomain.com/nintendo/dsBackup and format your microSD, and restore the files afterwards. This helps sometimes with Freezing issues.

hm this seems very confusing...well I decided to just buy the game instead