Cutting Shimmer Sheetz

I was trying to die cut Shimmer Sheetz with a thin metal die in my Cuttlebug, but I can't cut through the Shimmer Sheetz. I tried adding a thin metal shim and a card stock shim but nothing seems to be working. I get a great impression on the Shimmer Sheetz but not the cut I want. 

Has anyone used Shimmer Sheetz or have any ideas? 

Thanks for for your help.