URGENT. 4 speed on 250 xflow. gears not moving.

[XCwillo]

Hey guys I'm in eaglby near logan and we've just chucked on a 4 speed onto my 250 x flow. At first the gearss didn't move at all, but after a while they have loosened up slightly but we cant find all the gears, only cm move up and down. How do we loosen em up? I need to drive back to hervey bay today so I need it working!
There's a thread going into the gearbox itself with a nut on it which adjust how far in or out the thread is, does this change the looseness of the gears?