Problems with setvelocity

Hi, I am trying to move an OgreNewt body with setvelocity().

In this case, a key is pressed, like 'w' and inside the framelistener, my program calls setVelocity(Vector(5,0,0)) for example, but nothing happens.

Other command like setPositionOrientation() works very well, but I need to use setVelocity command, so how can I solve this problem?

setVelocity in the framelistener worked when in create scene function I had putted setStandardForceCallBack(), why this happen? I don't want to use gravity in my program.

Thanks for help

Use a custom force callback and make the calls inside there, that is the only place that call (and most others) can be made.