I have some major emoji problems

My emojis randomly stopped working on my iPhone 4.it's fully updated. All of the sudden they aren't sending all the way through! To me i can see the emojis in the convo but when I send them to people, on their phone it looks like "?=?" and they have iPhones with emoji also so know the problem is on my end. What do i do to fix this!

Ask the doctor!

I would try restoring your iPhone. It seems to help a wide range of problems iOS 5 has brought upon us! Temporarily though