PMDG 737 always crashing when approaching in VTBS.

Hello, so i have this bird almost over an year now. I really love to flight it. But as you see on the title i have a problem. I made a flight with FSC from Kathmandu VNKT to BANGKOK VTBS. 

Im using the payware "aa sceneries bangkok" So this is the second time it happens, well the game crash, now i tell you what happen.

So everything is set in fmc, route etc...

I take off.

 Im cruising

Then it´s time to approach.

The VNAV descending for me. About 70 Miles from airport, i get the message what runway i may land on. The message was ILS 1L. I go to VTBS approaches in fmc, and selecting the VTBS>ILS 1L and selecting a star. All systems seems to work fine. There is thunderstorm, im using rex overdrive clouds. But FPS is fine about 38. Now im on 7000 feet, and in 8 miles or so, the route gonna make the sharp turn, to line up with runway.

And bum, crash. 

The first time it also happened about 8 miles from the airport. I have tried to takeoff from the airport and it worked fine, so i dont think its a scenery problem.

It just freezing and crashing 3 min after. I get fatal error.

Please help me, i really want to approach in bangkok, in thunderstorm

And yes i have lastest drivers to my AMD Card.

My addons:

REX + Overdrive.

aa sceneries bangkok

PMDG 737

Information about error

System Spec.

GPU: Gigabyte AMD RAdeon 7970 GHZ edition

CPU: Intel Core-I7-2700k

RAM:16 GB Corsair Vengeance

Harddisk: 4TB WD black FSX installed on this drive.

SSD: 500 GB Samsung

PSU: Corsair CX600

Blu-ray reader: Samsung

Hope you can help me guys

Math.

Sorry for bad eng.