you will have  a problem with those hydralic rams that connect two parts. There is a trick to do them but it is a bit complicated.

 

Essentially you make the ram in two parts, connect each to the body part they attach to

Thigh< ram_a-1     and hip<ram_a_2   and  then you use point at to get them to work. It does take some adjusting of the joint center.

I would leave them out for a first attempt.