how stuck? sometimes if they havent been used in awhile your fingers arent strong enough to turn, try a pair of pliars gently, if that dont work, you most likely need to take your hubs apart and regrease, and if that dont work you might need new hubs good luck
At very least you need to remove the hubs; completely disassemble, clean up any burrs with a file, wash all the parts up and then grease and reassemble!
If it's a matter of the lock dial being stuck a dousing with penetrant on the face may help but complete service is inevidable. If you remove the hubs first make sure you just unboolt the complete hub before you remove the faceplate.