Why is bitcoin-qt not launching?  Using linuxmint-12-lisa i'm using LinuxMint-12-lisa and installed bitcoin-qt as described

Installing Bitcoin-Qt on Ubuntu

sudo add-apt-repository ppa:bitcoin/bitcoin

sudo apt-get update

sudo apt-get install bitcoin-qt

bitcoin icon appeared to Application list and available to execute, but nothing happened after start. Please help
There is a bin folder that contains the binary. There are two folders in that folder, "32" and "64". You have to know what type of system your mint/computer is. It either a 32 bit system or 64 bit system. If you click on on a 32 bitcoin-qt on a 64 bit computer it will not start and vice versa.