Arma2 Patch 1.01 (beta/final) installation problem

[Arma2 Patch 1.01 (beta/final) installation problem]

My system:

CPU: Intel Core 2 Duo E6750

RAM: 4GB

Graphic card: Geforce 8800 GTS 512 (with the latest driver)

Motherboard: Gigabyte P35-DS3

System Software: Windows XP Home Edition 32 Bit with SP3

The problem:

I bought the game Arma2 from Gamesplanet and downloaded the 6,89 GB Files. I installed and played arma2 (standard version 1.0) without any warnings and problems.

I tried to install the Beta and Final patch (1.01) but after two minutes the patch stops installing and i get this error message:

I tried a few things:

-reboot after installation

-close arma2 task

-start a mission save and quit the game

-replaced the damaged files in the addon folder with the old one

-installed the patch many times

Please help me that i can play arma2 with the latest patch.

Thanks for your help and sorry for my bad english.