I've just downloaded the TrackMania2 Stadium Beta from steam and tried to run it, however the track, ground and some other elements of the game were invisible in both multiplayer and singleplayer, as seen in the following picture:

I tried playing around with the game settings as well as re-starting the computer and neither of them fixed the problem, then I tried re-downloading the program and that didn't fix it either.
The specs on my machine are as follows:
- Windows 7 Home Premium Service Pack 1
- Intel Core2 Duo CPU E8400 @ 3.00GHz
- Motherboard: Gigabyte EP45-DS3P
- 4GB of RAM
- ATI Radeon HD 5800 Series
- Running on Dual Monitors
Thanks otherwise.