changing the primary value of extrusions

Hey all,


I'm trying to do an optimisation analysis in ANSYS with a Solidworks geometry. To get ANSYS to recognise the dimension as a parametric I have to preface the primary value with DS (or whatever I set it to) which isn't a problem in sketches and whatnot, however I cannot seem to change the primary value name of an extrusion.

[IMG]http://i42.tinypic.com/2gtpu8h.png[/IMG]

(in the picture I need to rename the TXD1@Scheme2 to DS_beam_thickness@Scheme2)


Can anyone point me in the right direction?


Any help would be greatly appreciated.

SolidworksConfigurations design Tables