Nano wallet cannot sign in

Hallo
about a year ago I bought Nem, set up the Nano wallet. Now I cannot select anymore the wallet .When I enter my password I cannot sign in.
what can I do? It would be great if someone could talk with me via Skype .
thank you
Dorothee

Have you still wallet loaded in your NanoWallet? If not have you wlt file and password or plain text private key?

hallo
I have a mark , I click it, in the browser appears:
file:///Users/dorotheesproedt/Downloads/NanoWallet/start.html#!/
I click it, Nano Wallet appears. I go to log in. there it is written:
Already a NEMber?
Select a wallet : select a wallet in local storage
Password: enter your wallet password or passphrase.

so last year I could select a wallet. Now I cannot. after giving my password, I cannot sign in.
what to do? I have little experience. so please write long and good explanations.

thank you

Looks like you clear wallet from cashe. Have you wlt file + password or private key backup ?