Have you had this fork for awhile or is it new to you? Did it used to work then stopped, or has it always been seized?
If they are new to you, then the previous owner most likely removed the caps and did not set them properly before reinstalling them. Fixing it is easy, but you have to wonder why they removed them and what else they messed up.
http://www.bayarearidersforum.com/forums/showthread.php?s=&threadid=147565
Read this thread. It is a good walk through of tearing down a Honda conventional cartridge fork. At the end, Zoran(TWF) describes the method of setting the rebound adjustment before installing the cap.
P.S.-you should include your location in your profile so guys local to you can offer up assistance. Good luck.