Shader Problem

I got a shader recommended to me by a friend. However, although it looks like it might be decent I get an error when trying to compile it.

 Shader error in 'FX/Force Field 1': D3D shader assembly failed with: (40): error X5469: Dest register type for SINCOS must be temp (r#).

I think it was originally made for an older version of unity. Could this be a version problem? Any idea how to fix it.