How come when i get a text on the rumor touch it doesn't show up as a bubble?

i have the rumor touch from virgin mobile and i know when you get a text it shows up on the main screen as a bubble, but mine hasn't been doing that, is there a way to turn it on?How come when i get a text on the rumor touch it doesn't show up as a bubble?
its probably because its a different phone.How come when i get a text on the rumor touch it doesn't show up as a bubble?
I Have The Same Exact Phone .

So If Your Bubbles Arent Up , Then Click On The Blue Button At The Top With The Number Of Bubbles -- Or Go To Your Display Settings And Turn On The Whisper Notifications .