preview problem with xp sp3 and explorer

hello, i'm testing this good cad software

i notified that explorer cannot show the preview of dwg drawings but only the bricscad icon (using xp sp3, and obviously the preview mode enabled in explorer)

the preview is correctly showed using the bricscad "open"  command and the preview option enabled, and the dwgs are correctly opened

the dwg extension is associated to the bricscad software

thanks in advance for every suggestions

 

best regards