moveit: cannot move interactive marker with IKfast

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Hello
i´ve a problem with ikfast for moveit. i´ve gone trough all tutorials and KDL and Trac_ik are working fine in rviz. However when i´m using the 3DOF IKfast i cant set the goal position with the marker or interact in any way with the leg with Move Group Interface. The leg is a simple leg with 3 actors in a row.

when i print openrave-robot.py <myrobot_name>.dae --info links i´ve got the following links

base_link     0                  
thorax        1     base_link    
leg_center_l1 2     thorax       
coxa_l1       3     leg_center_l1
femur_l1      4     coxa_l1      
tibia_l1      5     femur_l1     
tibia_foot_l1 6     tibia_l1

the ik-fast was calclulated with

python `openrave-config --python-dir`/openravepy/_openravepy_/ikfast.py --robot=<myrobot_name>.dae --iktype=translation3d --baselink=2 --eelink=6 --savefile=ik_leg1.cpp

so it is the exact same problem as in this case https://www.youtube.com/watch?v=M1c8A... but using "position_only_ik: true" in kinematics.yaml doesnt solve the problem

leg_1:
  kinematics_solver: group_kinematics/IKFastKinematicsPlugin
  kinematics_solver_attempts: 3
  kinematics_solver_search_resolution: 0.005
  kinematics_solver_timeout: 0.005
  position_only_ik: true

I assume that the IK cannot solve for the solution and somehow the srdf may be wrong. I´ve used many configurations in the srdf from assigning only joints and one eef.

    <group name="leg_1">
            <joint name="base_joint" />
            <joint name="leg_center_joint_l1" />
            <joint name="coxa_joint_l1" />
            <joint name="femur_joint_l1" />
            <joint name="tibia_joint_l1" />
            <joint name="tibia_foot_joint_l1" />
        </group>
  <end_effector name="leg_1_foot" parent_link="tibia_foot_l1" group="leg_1" />

as putting putting everythin in a chain, put the rest in a subgroup

    <group name="leg_1">
        <chain base_link="thorax" tip_link="tibia_l1" />
    </group>
    <group name="leg_test">
        <joint name="leg_center_joint_l1" />
        <joint name="coxa_joint_l1" />
        <joint name="femur_joint_l1" />
        <joint name="tibia_joint_l1" />
        <joint name="tibia_foot_joint_l1" />
        <joint name="base_joint" />
    </group>
<end_effector name="leg1eef" parent_link="tibia_l1" group="leg_test" parent_group="leg_1" />