[Freeswitch-users] user busy, Q=850,cause=16

Hi I am getting this: SIP/2.0 486 Busy Here. Reason: Q.850;cause=17;text="USER_BUSY" but FS trasnfer this to: SIP/2.0 486 Busy Here Reason: Q.850;cause=16;text="NORMAL_CLEARING". which is not ok it should send cause=17 further. I tried with: continue_on_fail=false hangup_after_bridge=true before bridge but no luck. Could some help me resolve this issue? tnx miha