You know what helps? Sentences. Let me get this straight, you tried to send KnightOS to wabbitemu and it gave you an error. You redownloaded wabbitemu and resent and it still failed. You reloaded your ROM file and it doesn't work?
I need to know some stuff:
1. What ROM were you running when you tried to send knight OS. Calc version and OS version currently on it and bootcode if you know it. Did you get the ROM from your calc or did you acquire it via other means
2. What do you mean by can't use wabbitemu?
3. Where did you get your copy of Knight OS from?
4. Where did you download Wabbitemu from?