UDK crashes on terrain editing

[kepler]

Hi,
I installed UDK yesterday on my pc, i started with a map creation, using Terrain Editing mode.
When the Unreal TerrainEdit panel opens I move the mouse in the map to start painting, but, when I enter on the terrain the UDK crashes.

PC Specifics:
Mobo: ASUS P8H77-M
Processor: Intel Core i5 quad core
Video card: NVIDIA GeForce GT-630
RAM: 4GB RAM DDR3 1330MHz
OS: Windows 8

I think that's all, any helpo is appreciated.

P.S. My english sucks. I know.

[fighter5347]

- Start UDK with admin rights
- use the landscape tool: http://www.youtube.com/watch?v=bCH1Ciy05_A