A GPU card is required for this feature and you must have a good device driver for it installed. ALSO
Is you video card one of the text GPU Cards? http://helpx.adobe.com/photoshop/kb/photoshop-cs6-gpu-faq.html#tested_cards
Do we know what version of Photoshop the OP uses?
I would like to add that this filter and others worked fine in the beta version.!
I have now since noticed that the Liquify filter crashes the program alltogether.
I have the latest driver and updates.
I went to the page that you included in your post and checked everything to no avail.
What do you mean by to no avail this is what is on that page do you have one of those cards installed??
Tested video cards for Photoshop CS6
Adobe tested the following video cards before the release of Photoshop CS6. This document lists the video card by series. The minimum amount of RAM supported on video cards for Photoshop CS6 is 256 MB.
Note: Adobe tested laptop and desktop versions of the following cards. Be sure to download the latest driver for your specific model. (Laptop and desktop versions have slightly different names.)
nVidia GeForce 8000, 9000, 100, 200, 300, 400, 500 series
nVidia Quadro 400, 600, 2000, 4000 (Mac & Win), CX, 5000, 6000
AMD/ATI Radeon 2000, 3000, 4000, 5000, 6000, 7000 series
AMD/ATI FirePro 3800, 4800, 5800, 7800, 8800, 9800, 3900, 4900, 5900, 7900
Intel Intel HD Graphics, Intel HD Graphics P3000, Intel HD Graphics P4000
Note: ATI X1000 series and nVidia 7000 series cards are no longer being tested and are not officially supported in Photoshop CS6, but some basic GL functionality may be available for both these cards.
I have an AMD 6700 series card which worked fine with the beta.
AMD/ATI Radeon6000 series has been tested not what Version of the ATI drivers do you have installed. Some versions have issues.
The version that I have 12.3.
I am happy to report that after I rolled back to 12.2 myy filters now work!