Unable to type password into Screenlock - XFCE

[Mooresy]

Needed to move into a different account.

Alt+f2'd into new session.
Logged in with new account, i created on terminal just prior, using cmd
- adduser xyzxyz

All went well, was able to log in, did a few bits in sudo etc, moved back to default F7 view, 10 mins later went back to tty2 where i found screensaver/screenlock kicked in, when dialogue box to enter password popped up, couldn't type password in (greyed out).