Windows 7 BSOD during After Effects

[Digidon]

Dear friends,

I have a new comp with the following specs:

CPU: AMD Phenom II x6 1100T Black Edition
Motherboard: Asus M4A89TD PRO/USB3
GPU: Sapphire Radeon HD 6850 1gb 256bit
RAM: Kingston HyperX 12gb 1600MHz DDR3
HDD: Western Digital Caviar Black 1tb

OS: Windows 7 Ultimate x64 SP1

I can play in the latest games (such as MW3, Battlefield 3, etc) without any problems. I use 3D applications and render heavy 3D projects. I don't face problems with other applicaions.

I also use Adobe After Effects CS5. I can apply multiple effects and render huge compositions. Only when I apply "Ramp" effects and make changes to it or render compositions with Ramp effect BSOD appears.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1049
Additional information about the problem:
BCCode: 124
BCP1: 0000000000000000
BCP2: FFFFFA800AD86028
BCP3: 00000000B64EC000
BCP4: 0000000000000135
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

I attached the files containing information on BSOD.

Please help me to fix the problem.

Thank you in advance.