Ack! PMD-Explorers of Time freezes

Hey guys. I'm playing Pokemon Mystery Dungeon Explorers of Time on DraStic DS emulator (it's for android systems). Things were fine for a while until I got to chapter 11 (the part where chatot tells you to look at the wanted poster of the time gear thief). The game freezes at this part and becomes unplayable. Pls help. I'm using the latest version of my emulator and my ROM is from a well-known source.
Post Merge: [time]1383895570[/time]
Ah oops. I mentioned the wrong emulator. It's the DeSmuME emulator.

Somehow I suspect it's a faulty rom copy you got rather than the emulator's fault. Getting the rom from a well known source doesn't quite guarantee it's quality. Try downloading a new rom copy from other source, rename the rom to match your save file's name so that you can keep using the old save file. If that doesn't help, try using a newer version of the DeSmUMe emulator : http://www.emucr.com/2013/11/desmume-svn-r4837.html

Thanks for the help. I'll try downloading a different rom. See how that turns out. I'm so far ahead already.