Ok i've found a new thing ...
I have try to get the experience bar progress like the LifeBar,
Then i make a Set with with the mathematic code ( Self.InitialWidth +( Experience.experience - Experience.nextlevel ) * ( Self.InitialWidth/Experience.nextlevel ) ) ( I think it's not good ^^' ... ) But nothing happens ... Then i think it's the same problem as the Level i can't take the information of array, if someone can help me =D