Tokamak joints limited?

This is strange: when i use < 100 joints in my simu (a goalnet) everything works fine, >100 they do no link anymore, the rigid bodies fall to the ground. a bug?, my fault?
is there anything like "SetRigidBodiesCount" for joints?
btw: i'm using the newest version

you need to check the offical tokamak wrapper forums
http://playerfactory.proboards25.com/