Check engine light won't go off

I have 98 accord EX. The check engine light was on forever. i changed the cat converter and the oxygen sensor because that is what the computer said. Checxk engine light went back on after I got it inspected. Time for inspection again and I don't know what to do. Please help. i am new to this forum, but I have had great luck with a motorcycle forum. i am sure you can help me. i'll say thanks in advance.

andy