Naboo and other maps crash?

[Lozza]

When I play the Naboo map and some other maps the map finishes loading then crashes to desktop? Whats happening? When I say Naboo, I DONT mean stock Naboo I mean the one that came with the convo

[tnt_1992]

some maps MUST be the first map u start and it also help to have gfx settings on low most maps that hav classic conquest have to be the first map played once the game is started

[drouid2]

any reason why the clone wars era for classic mode is the only era that crashes? gcw era works perfectly well