First, are you sure that your Armory wallet are synchronized correctly and loaded up to the latest block?
Next, check and make sure that you've sent your coins to the right address, which in this case is your armory address.
Last, are your transaction are already confirmed by the miner and already included in the block ?
one of the first mistakes newbies make are not realizing that transactions need to be included in a block first before it appears on your wallet.

If everything else fails, try to head to Armory sub-forum, there are a bunch of guys ready to help you out with your problem
https://bitcointalk.org/index.php?board=97.0