bottom Tear is sagging... Can anyone help solve this problem???

what type of support do you use?

It's tier.

I recommend SPS for support. 

In a tiered cake you MUST have support.  You never just place one tier on top of another.

Leah is right, you need to support your cake tiers. The rule is to support every 4" of cake. There are several options, the SPS seems to be the best, but in my country its not available. I use dowels and cake boards. Some people use straws. The best is to google stacking cakes and you will find a lot of tutorials.

A tiered cake has to have a support system.  I use bubble tea straws in each tier and 2 wooden dowels with a sharpened end hammered (literally) through the entire cake.

For the bubble tea straws I use 2 less than the tier size it is supporting.  So, if I have a 10" cake on the bottom and an 8" cake on top of it, I would place 6 bubble tea straws in the 10" cake.  If the cakes are round I place the straws in a circle too.  If the cakes are square I place the straws in a square.

I highly recommend you purchase Sugar Shack's DVD on stacking.  It is so helpful!  Actually, I recommend you purchase all of her DVDs.  They have helped me a lot.

Nope you don't look stupid for asking-or should I say learning. That's what is so great about Cake Central there are so many knowledgable people willing to share by their past experiences. We all start somewhere. Happy Caking! 

Many of us have done the same thing ;-) I even made a "wedding cake" without support, and each tier only had 1 layer, so it was short and squat lol 

Here's some stuff to read. For free.

http://www.wilton.com/cakes/tiered-cakes/

You don't need DVD's all you need is google "cake support system" 

Many years ago I made a two-tiered birthday cake (8 and 6 ) for my son. It was just for the family and I was going to stack and serve it within hours. So I plopped the 6 on top of the 8 and carried it to my dad's house. Well the birthday boy slept through his birthday dinner! We didn't cut the cake because we wanted to sing happy birthday. By the next morning the 6 was leaning perilously to one side. I had to wake the kid up, first thing, and make him blow out the candles!

jen

No questions are stupid!! When learning we have to ask questions. There are many videos on youtube that will help you. Here's one below that may help you.

Just make sure you have leveled the cakes before stacking them.  Good luck/ You can do it!!!!

http://www.youtube.com/watch?v=NvaCSW78ybc