I know I must be missing something. I have SONAR X3.
I put a pattern successfully in bar 1. I stretched it, but it only plays the first bar. It pastes as 4 bars with only one bar of sound so I cut it down to 1 bar, tried copy and paste, and it looks like it pastes, but it doesn't make sound. What am I doing wrong?

OK the information seems to be there if I extend or paste, but it only plays one bar from whichever bar the cursor is on.

I assume this is a groove clip?  If it's not, you can make it one, then stretch it out - it would play as expected then.
 
(I don't recall the command to make it one right off and I'm not at the DAW).

It's one of those samples by that drummer that comes w/Session Drummer. I tried to stretch it and only the first bar plays.

Ugh. I was putting this information into the audio track instead of the MIDI. So now I'm having fun, but before I get flustered, how do I convert the MIDI info to audio? I've seen some videos but they must be older or newer because the layout doesn't look like mine.