what am i doing wrong
 

what am i doing wrong here, i got another tileset and want to change it back to the main one but it doesn't work
(i tried with clientside)

// NPC made by Jaffer (Chill)
if (created) {
addtiledef pics1.png,0,0;
}
if (playertouchsme) {
}

Why is the level 0?
addtiledef tileset.png,level(s),type;
Also, remove all the stuff you don't need:
//NPC made by
if (playertouchsme){}
there isn't a point in keeping them.

Use removetiledefs; :)

//#CLIENTSIDE
if (created) addtiledef (tileset image name),(levelname),(type);