Game Crashes, Checkpoint 2 [Mission 4]

[Gorechild]

Game Keeps Crashing on Mission 4..
At The SEcond Checkpoint Where You Destroy Orks SEcond Base (Next To River)..
It Allows Me To Move Around Map.. But Units Dont Move And i Cant Select Anyhting..
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Fatal Scar Error - Execution Paused

^ It Says That

[ÜberJumper]

Make sure you don't build a second base before it tells you to.

If you can, go back to the latest save game, select your second base, and hit the delete key.