Catia V5 Kinematics - Can't simulate this assembly.

Trying to get this assembly to simulate but it doesn't work properly. Anyone able to help? Bonnet should rotate 60 deg up about the hinge point. Gas struts will move with along it. Rotate joint for the main hinge to bonnet, spherical joints to connect the upper and lower gas struts to the hinge point/bonnet. Cylindrical joint to keep the 2 gas struts coincident.
What am I missing to get this to simulate?