If you go to the Devices tab, and select these locks, there is a page that comes up where you can configure the device type, change the name and so on (the settings page).
On that page, there are some buttons where you can try the lock. Can you successfully unlock and lock from there? Does the current states (upper right) follow the lock and unlock?
I also circled where to change the driver (device type) on the right lower part of the screenshot.
If it works from there, that rules out the lock itself or the driver being the problem for the most part. From there, I would guess it is whatever app you are using (you didn't specify what one) is having issues.