Default CM11 mms app fc'ing

Hey guys

I really want this app so bad: http://forum.xda-developers.com/show....php?t=2600839
But when I follow instructions when installing the apk, the app works but when I try to open conversation or make a new conversation, the app forces close. So I can also enter the settings of the mms without settings, but I just can't type a message or open a message, the app keeps fc'ing....

anyone faces the same problem or knows a solution? I would be really grateful...