Is any one else having a problem making the sirens in the Police Cars work Properly. Spoiler <spoiler>On the crime and punishment mission, I steal a police car, sirens working, pull over the first van, then when I get back inthe car the sirens are off. I hit L3 and the horn sounds but the sirens don't come back on again. The only way round it is to steal another police car, by which time I've failed the mission.</spoiler> Am I doing something wrong? Is it because the poice car is a bit beat up ?