Crash after m = XMMatrixIdentity() - alignment memory in classes?

Question

I was looking at the tutorials in DirectX SDK. Tutorial 5 works fine, but after I have copied and separated the code to my own classes, I got strange error during launching

Answer 1

Thank you.

Finally I decided to use XMLoadFloat4x4() and XMStoreFloat4x4() functions. I store members of class as Float4x4 and convert them for temporary use to XMMATRIX every render() loop. But... it's a fast or dumb solution?