I am trying to simulate a coupled system of `N` blocks and springs. I am using `NDSolve`. For `N = 25` everything goes smoothly, however for `N > 25` it doesn't work. No error message, no warning, just the usual **beep**. 

Is there any limitation on the number of ODEs `NDSolve` can handle? (I'm using V9.0.1.0, Home Edition.)