Creating a TTree with TClones array: what is wrong?

Dear all,

I have tried to create a class which should look like the "Event" class which can be found in $ROOTSYS/test, because I need to do a thing which is similar to that.
When I try to fill a TTree, I get an error in the TClonesArray streamer. Can someone detect what is the error in my code which causes this problem?

I attached a tar ball with the code I developed.

    Thanks and best regards

             Alberto