Blender 2.67b to unity 4.1.5

Hello, i’M using Blender 2.67 and Unity 4.1.5

Blender could not convert the .blend file to FBX file.
You need to use Blender 2.45-2.49 or 2.58 and later versions for direct Blender import to work.

I tryed with many Blender versions, is there any way to solve this problem?
That would be better if i dont need to convert to .fbx .

Or please write down what’s the best way to import blender created models.

Thank you in advance,
George

you dont need fbx, although unity likes it the most. Obj also works great, so try that