Quaternion To Matrix conversion failed...

Hey

Im new with dat engine so sry for this questions

I try to import my Blender model into unity ... if i drag and drop th file blender crashs...thatswhy i use the export menue to export the file to FBX... i tried to animate my model in unity and i get this message:Quaternion To Matrix conversion failed because input Quaternion is invalid {-1.#IND00, -1.#IND00, -1.#IND00, -1.#IND00} l=-1.#IND00

Whats wrong with the model ?

2 Why noone use get & set in c# scripts ?

3 Why you need an IEnumator object for WaitForSeconds ? Or am i wrong?

4 I try to programm an editor for the maps (everybody should be able to create maps for my game) whats the best solution ? A map Class with [serializable] wich i put into an BinaryFormatter and FileStream ?

Thx