motu midi (driver?) problem

i have a keyboard, connected to a motu fastline usb interface. i used to use it earlier and it worked perfectly. then i disconnected it all and stopped using for awhile.

i've today connected it again. the computer recognises the motu usb connection, but asks for drivers, despite the fact i never uninstalled or moved anything, and ive tried reinstalling and its still not working.

can anyone help? im not even sure if this is the right place to ask, so if someone could redirect me or osmething. cheers