I'm having real problems with electrum, and sending my LTC on my paper wallet to any other address

I must be doing something wrong.
I create a new wallet to import addresses/private key of my paper wallet.
I scan the private key with my webcam - it recognises and sees the correct key.
It sees my balance but says it is read-only, despite me having entered the private key.
There are no options to enter the password I setup with this paper wallet.
I try to send LTC to another wallet, and it just hangs there as unpaid.

What’s happening?