Hi, Susan! I'm so sorry you had trouble with the cake, I know you really wanted it to turn out perfect! I made my first BCT this weekend too, and it would start melting pretty quick when I was handling it, but I just checked on it in its Rubbermaid cake carrier, and it has set up okay, so I can't imagine what happened to yours!
It almost has to be the moisture in the refrigerator, mine has been out since I got it on the cake and iced around it. I had to cut part of mine off, I had actually put "Happy Mother's Day" on it, but I just got it backwards, not a mirror image (just a slight error). I did figure out you definitely need borders and framework, and evidently it has to be something besides buttercream icing! I've re-read Cali4dawn's instructions, and she said she uses store icing (not a brand name) to do the outlines, so that's where my problem started by not doing that!
We will both just have to consider this a learning experience and try it again, right? Right!