I dont know if this helps or not, I used this Litecoin block explorer to validate my adress and I can find it:
http://explorer.litecoin.net/address/LdhDH5ufJ8cApvNYSrka1F2H5xaM787eqPWhile I was relieved to see my balance being there I have no idea where or how to input the private key to move the balance to my online wallet.
What I have tried is downloading the Litecoin-qt and syncronizing it with the Litecoin blockchain after which added the adress with a label to the adress-book in the client. I have then tried to use the debug console to input command; importprivkey <litecoin private key> [label] where the label is the label as the ltc-adress in my adress book. Still it gives an error...