box2d put dynamic sprite over static sprite in box2d

[nezarabd]

i have two sprite on is dynamic and the second is static 

an d i want to put the dynamic sprite over the other when i drag it beside it

i  use setBodyContactCallback to check collision like that

m_ship.body.setBodyContactCallback(enemy1, enemyCallback, this);

in the  enemyCallback function

function enemyCallback(body1, body2, fixture1, fixture2, begin) {

i wrote

 game.physics.box2d.weldJoint(body2, body1);

 

but not work

can any body know solution

thanks in advance