The ILS is interlocked, so if the wind direction is wrong, the ILS for the inactive runway direction is switched off. Set a headwind (can't remember what the threshold is, but around 5-7 knots), and you should be good to go.
IRL ILS availability for inactive runways is usually up tp the local ANSPs to decide for CAT I or lower, but CAT II and III systems are always interlocked.