Remix by AFX (off of aphex twin's "26 Mixes For Cash"). Get up and move...this is the shit. I can't sit still with this song playing.
That album is (as the name kinda suggests) a collection of remixes Aphex Twin has done, presumably in return for cash. Thus, every song on the album is a "Remix by AFX", but none of them are actually called that. As far as I know.
The chances are you're refering to either Seefeel - Time To Find Me (AFX Fast Mix), 808 State - Flow Coma (AFX Remix) or Baby Ford - Normal (Helston Flora Remix By AFX), because they're the ones that are actually credited to AFX, rather than Aphex Twin. More specifically, It's probably 808 State - Flow Coma (AFX Remix), because it's dance-tastic. If this is the case, then yeah. I get the freak on too.
Also, Mob Nation - Got Numb which coincidentally, comes right after that Aphex Twin track on the Amon Tobin Solid Steel Mix CD. It's a goddamn banger, and has never been released. Curses.