Did what you suggested:
Code:
reset(main_menu,VISIBLE);
	reset(main_menubuttons,VISIBLE);
	level_load("level1.wmb");
	wait(4);
	mouse_mode = 0;
	camera.pan = -180;
	ent_createlayer("clouds.jpg",SKY|CUBE|VISIBLE,10);

I also replaced similar instances like this.

But still doesn't work.