MoveablePlane not derived from plane?

Hi Guys,

Code says more then thousend words:

MeshManager.Singleton.CreatePlane("name", "groupname", Plane, width, height);

Third param is a Plane, and i want to put an Moveableplane in there, but compiler said its impossible.

After a quick look into OgreMoveablePlane.h, i can see MoveablePlane SHOULD be derived from plane.

But...why then it didnt works? Do i have to compile Mogre by myself? (I Use latest morgre 1.4.8 here from Forum).

Greetings Bostich

//k i found it by myself
MoveablePlane._getDerivedPlane();

REALLY strange