directx program crashing

I have been working on loading bsp levels in with directx in my current project and I've had a few problems. First, does directx crash when you feed it too much data. For example, when I comment out my frustum culling code just to check if the level will render, the program crashes. If I only render a small percentage of the leaves then it doesn't crash, or if it is a small level. Second: The reason I've had this trouble in the first place is because I can't get my frustum culling code to work. I am loading quake 3 .bsp files. I cull away clusters fine, but the problem comes when checking if a box is in my frustum. I've been checking over my frustum calculation code and my box in frustum function and I am just stuck and feel like giving up. I will list my code for those two functions if anyone thinks they can help.


void Camera::Frustum::CalculateFrustum(){
	D3DXMATRIX   proj;								// This will hold our projection matrix
	D3DXMATRIX   view;								// This will hold our view matrix
	D3DXMATRIX	 clip;								// This will hold the clipping planes

	g_pD3DDevice->GetTransform(D3DTS_PROJECTION, &proj);
	g_pD3DDevice->GetTransform(D3DTS_VIEW, &view);

	D3DXMatrixMultiply(&clip, &view, &proj);

	// This will extract the RIGHT side of the frustum
	m_Frustum.a = clip._14 - clip._11;
	m_Frustum.b = clip._24 - clip._21;
	m_Frustum.c = clip._34 - clip._31;
	m_Frustum.d = clip._44 - clip._41;

	// Normalize the RIGHT side
	D3DXPlaneNormalize(&m_Frustum, &m_Frustum);

	// This will extract the LEFT side of the frustum
	m_Frustum.a = clip._14 + clip._11;
	m_Frustum.b = clip._24 + clip._21;
	m_Frustum.c = clip._34 + clip._31;
	m_Frustum.d = clip._44 + clip._41;

	// Normalize the LEFT side
	D3DXPlaneNormalize(&m_Frustum, &m_Frustum);

	// This will extract the BOTTOM side of the frustum
	m_Frustum[BOTTOM].a = clip._14 + clip._12;
	m_Frustum[BOTTOM].b = clip._24 + clip._22;
	m_Frustum[BOTTOM].c = clip._34 + clip._32;
	m_Frustum[BOTTOM].d = clip._44 + clip._43;

	// Normalize the BOTTOM side
	D3DXPlaneNormalize(&m_Frustum[BOTTOM], &m_Frustum[BOTTOM]);

	// This will extract the TOP side of the frustum
	m_Frustum[TOP].a = clip._14 - clip._12;
	m_Frustum[TOP].b = clip._24 - clip._22;
	m_Frustum[TOP].c = clip._34 - clip._32;
	m_Frustum[TOP].d = clip._44 - clip._43;
	// Normalize the TOP side
	D3DXPlaneNormalize(&m_Frustum[TOP], &m_Frustum[TOP]);

	// This will extract the BACK side of the frustum
	m_Frustum[BACK].a = clip._14 - clip._13;
	m_Frustum[BACK].b = clip._24 - clip._23;
	m_Frustum[BACK].c = clip._34 - clip._33;
	m_Frustum[BACK].d = clip._44 - clip._43;

	// Normalize the BACK side
	D3DXPlaneNormalize(&m_Frustum[BACK], &m_Frustum[BACK]);

	// This will extract the FRONT side of the frustum
	m_Frustum[FRONT].a = clip._14 + clip._13;
	m_Frustum[FRONT].b = clip._24 + clip._23;
	m_Frustum[FRONT].c = clip._34 + clip._33;
	m_Frustum[FRONT].d = clip._44 + clip._43;

	// Normalize the FRONT side
	D3DXPlaneNormalize(&m_Frustum[FRONT], &m_Frustum[FRONT]);
}

bool CFrustum::BoxInFrustum( float x, float y, float z, float x2, float y2, float z2)
{
	// Go through all of the corners of the box and check then again each plane
	// in the frustum.  If all of them are behind one of the planes, then it most
	// like is not in the frustum.
	for(int i = 0; i < 6; i++ )
	{
		if(m_Frustum[A] * x  + m_Frustum * y  + m_Frustum[C] * z  + m_Frustum[D] > 0)  continue;
		if(m_Frustum[A] * x2 + m_Frustum * y  + m_Frustum[C] * z  + m_Frustum[D] > 0)  continue;
		if(m_Frustum[A] * x  + m_Frustum * y2 + m_Frustum[C] * z  + m_Frustum[D] > 0)  continue;
		if(m_Frustum[A] * x2 + m_Frustum * y2 + m_Frustum[C] * z  + m_Frustum[D] > 0)  continue;
		if(m_Frustum[A] * x  + m_Frustum * y  + m_Frustum[C] * z2 + m_Frustum[D] > 0)  continue;
		if(m_Frustum[A] * x2 + m_Frustum * y  + m_Frustum[C] * z2 + m_Frustum[D] > 0)  continue;
		if(m_Frustum[A] * x  + m_Frustum * y2 + m_Frustum[C] * z2 + m_Frustum[D] > 0)  continue;
		if(m_Frustum[A] * x2 + m_Frustum * y2 + m_Frustum[C] * z2 + m_Frustum[D] > 0)  continue;

		// If we get here, it isn't in the frustum
		return false;
	}

	// Return a true for the box being inside of the frustum
	return true;
}

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