Self turning plane in formation flying.

Hey guys.

So i decide to do some movies and fun flying with close formation.

I install FSRecorder,Full Fsuip,GSX,AcuFeel.

My problem is:

1.Any airplane (payware or free) is turning it self if flying close to other plane like is not allowing for collision.

2.I checked FSX.cfg   Fsuip settings GSX FSRecorder and cant find why its happend.

3.FSX setting for allowing crash is enable.

I thinks it could be FSUIP because its not happend before coz i was flying in very close formation,Now its impossible.Its like magic hand touch your stick and plane flying instantly to left or right to avoid collision.Any ideas.?

FSX ACC Sp2