[fowlplay4]

Your tileset doesn't work in the offline editor because it's 24-bit, you can fix that easily with a featured image editor (Photoshop, GIMP, Paint.NET) or Irfanview, or saving it as a GIF.

Post the script that's breaking if you want help with it, it's unfair to expect us to solve your problem with no details except that it doesn't work anymore.

All I can suggest is..

1. Make sure the npc-server is running. Restart it if neccesary. (/npcshutdown then /npcstart)
2. Make sure you have the weapon in your attributes.
3. Make sure savelevels=true in server options.