Friend can only play on .bit maps!?? [SOLVED]

[Sensei]

As the title says, if I host a game and use any other map that isn't game generated, he's gonna get kicked from the game.
Any way to solve this?

[h3oCharles]

I can confirm that, it happens in my brother's computer. It actually crashes when trying to load a color map due to some palette issue or sth like that, I don't know exactly what is the cause tho. Maybe GPU?

EDIT1: It was a steam edition from my library

[TheKomodo]

The 1st obvious thing, he has a legit copy?

[StepS]

Tell him to move the game out of Program Files.

[Sensei]

Tell him to move the game out of Program Files.

Worked. Thx StepS.