I've never had this issue before. The particles rotate when I increase the value, but once I add a keyframe, they don't animate or rotate. I tried parenting to a null, a camera, tried parenting the camera to the null and particular rotation to the null. Nothing works!
I reseting and starting all over. I should mention the particles are not moving. I set keys to have them generate and stop. Any help would be appreciated! Spent hours and not getting anywhere!
Are you using v1.5 or v2.0? If you are using 1.5, you cannot animate the rotation of particles. It won't do what you want. Trapcode fixed this problem in 2.0 by adding the world transforms. If you really need to rotate particles in v1.5, you have to rotate the camera around the particles.