For testing purposes I sent some BTC to a paper wallet from my bitcoin-qt client and later, after ~50 confirmations I imported the private key from the paper wallet back into bitcoin-qt with the command
importprivkey $key $label rescan
and after finishing the rescan it doesn't show anything. Well, almost nothing, it renamed the paperwallet address I sent to in the first place to "$label" in the outgoing transaction, but no other sign of the imported private key, especially the balance didn't change. The Blockchain explorer shows that the funds are still under the associated paper wallet address.
Can anybody explain why the funds don't show up under balance, what I did wrong, and how importing a private key into bitcoin-qt is done correctly?
Thanks!