can a superbright fade?

Hello,

I made an led (normal little 3 volt green LED) fade in and out, and then i replaced that led with a Luxeon R Neutral-White 1-Up LED Star, and it turns on, but wont fade. I was wondering if these super bright LED's are even capable of doing fade? any ideas??

I was wondering if these super bright LED's are even capable of doing fade?

Yes they are.

any ideas??

Post your schematic and code.