Exception Thrown and Unhandled Exception

Hello all,

I am trying to get this code to work. It builds fine, but when running it I get exception thrown: 0x001B656F in IrrBullet.exe: 0xC0000005: Access violation reading location 0x0000001C. Then I get Unhandled exception at 0x001B656F in IrrBullet.exe: 0xC0000005: Access violation reading location 0x0000001C. 

I am using C++ and Irrlicht 3D engine and Bullet physics. I have posted the code from where the exception is thrown. I can post more code if it is needed. 

	u32 TimeStamp = Timer->getTime(), DeltaTime = 0; //update time and physics
	while (!Done)
	{
		DeltaTime = Timer->getTime() - TimeStamp;
		TimeStamp = Timer->getTime();

		UpdatePhysics(DeltaTime …