hello.

i have a problem with my assembly regarding the knuckle and arm holding the frame to the knuckle .

at certain point i can only move the assembly only by selecting the knuckle  body, everything moves fine if i select that, but if i select the arm (either upper or lower) i cannot even move anything.This affect my steering assembly too.

here is the assembly which i attempt to move

selecting the knuckle allows all part to move

if i select the arm, all assembly lock up.

here is the list of parts i make flexible

-arm(flexible)

-knuckle(flexible)

-ball joint (flexible)

-frame grey colour(rigid)

were competing as a team this year in FORMULA STUDENT ENGINEERING ASSOCIATION(FSAE) this year.i hope someone can give me an advice.i already search the internet and forums but i got nothing(maybe not the right keyword i think)

here is my spec

-solidworks 2013 sp1

-core 15 first gen 2.4gh

-nvidia 310m

-8 Gig ram

-win7 64bit

thank you for your time