More info on the problem....
I did several tests, here are the results...
When I use addtiledef with pics1.png, it works.
When I rename pics1.png and do addtiledef, it doesn't work.
When I do addtiledef with a thing called pics, then use a NPC to open a tileset other then pics1, it doesn't work.
When I open a image using pics1.png as tiles, then open a tileset other then pics1.png it doesn't work.
When I replace pics1.png with my tileset, renamed to pics1.png, then use a NPC and open the same tileset with a different name, it doesn't work.
Those are the results...I really need help
I'm gonna try naming it pics2, 3, 4....