I don't know why my cream cheese frosting cracks when I move the finished cake...any ideas how I can fix this??? Thanks so much!

My first thought is your cardboard the cake is sitting on isn't strong enough for the cake. How big is the cake? How many cardboards are you using?

It was carrot cake (pretty heavy) on one cardboard. Should I put it directly on the plastic seperator plate?

I would still put it on a cardboard and then put it on the plastic plate. Simply because if you are leaving the cake with someone, it's easy to remove the cake on the cardboard and take your plate back with you. Plus when you cut it, the cardboard helps to protect your plate.

If not using a plastic plate, I tend to use 2 cardboards for 8 and 10" cake .... and 3 cardboards for 12" and larger cakes. One thing I learned here on CC ... when using multiple boards, turn the cardboards so the "grain" of the cardboards run in different directions ... that helps them be 'stronger'.

I never would have thought to use more than one cardboard, thanks!!! I'll certainly try it!