If you have an Athlon that should support SSE yet Chankast reports it not having SSE then do the following:
1. Get CPU-Z and see if SSE is detected on your system. If it is then it's a Chankast bug.
2. If not, you need to enable it in your BIOS - it is enabled by default.
3. If there is no option for it, update your BIOS.
4. If no-go, buy a better motherboard that actually supports your processor properly.