I thought the manual explained everything
pretty well, but maybe your problem isnt
covered there. Explain here what your problem
is with arming your system. There are many
people here, who are willing to help you, if
they can.
Also, did you call tech support? It is toll
free. When I had a new window sensor not act
right, they were helpful going through a
couple tests and sent me another new one
priority mail the next day.
Jim