It’s telling you that the graphics hardware does not support the extension you are trying to use.
It is possible that there is an update for the hardware (ie, new driver) that enables the extension (though unlikely) but you’ll have to check out the website of the manufacturer.
It is however very unlikely you’ll get to use the extension if it’s not supported, the only thing you can really do is to emulate it yourself in software…
[This message has been edited by Rob The Bloke (edited 09-02-2002).]