The procedure is the same for most DSC systems; however, it varies some depending upon the keypad model (the 5500 and 5501 are two different models).
Let us know:
Which system you have
What keypad you were using
What part of the procedure didn't work
If you need help finding the system model, take a look at the following FAQ:How do I find out which make/model home security alarm system I have?
User Manuals for many DSC systems are available for downloading from the forum's DSC Manuals Downloads Section (link in left column).