Are you getting any error messages in the scheduler? I had some out of memory errors my first night so I simplified a couple of my already simplified sequences to get them to run. Since I did that, I've had some pretty good luck with the scheduler to be honest. The first run through pains me, so I just started the show an hour before the advertised start time. By the time the real showtime rolls around, I'm off and running...
An alternative I've had success with is xlights, however, there was a longer loading delay between each of my songs. For now I'm back to LSP Scheduler, however, my understanding is that xlights should have a new version coming out before too long to do some preloading / caching of sequences.
I used Franks script to modify my exported LOR files to work with xlights as I'm running two different networks of lights. Franks script lets you specify which controllers belong on which network and the script will modify the channel definitions to work with xlights...
