Can't collect purple studs

[seanfl]

Hi.

I'm playing the PC version of Lego Star Wars 3. For some reason I can't pick up two of the purple studs.

The first purple stud is on the Resolute Bridge, in place of the Red Brick representing the Red Brick Detector. This is under the glass of the left-hand crew pit which is accessible through the crawl space off to the left.

The second purple stud is aboard the Separatist Landing Craft where you can buy Separatist ground vehicles. It's off to the right where the Red Brick representing Invincibility used to be.

I can pick up all the other purple studs in the game.

Does anyone know why I'm having this problem please, and what can I do about it?

Thanks