Help on locking - while flying blind

Hi people, The marvels of modern technology have enabled me to get my Informix CD, and set it up, all while waiting for the shipping people to actually send the manuals. I have a problem with locks, that is almost certainly covered in said manuals, but that I really need to rectify this century (and I'm assuming the manuals won't arrive until the next!) I can't see any system tables that show current locks. I've got an app where several people are attempting inserts, and they are banking up on lock contention, but I can't actually see where! Any help on how to view current locks in Informix will be much appreciated. Ciao Fuzzy :-)