Unlocking wallet problem

I was trying to send some Raven from a wallet I was mining to a couple of year ago that I have updated to version v4.3.2.1 tho I can’t seem to unlock it so I can send the funds.

I fill in the address the send to and hit send and nothing happens. The small lock at the says it is currently locked tho I have no option to unlock it. Any help will be much appreciated.

Thanks.