Maybe you have an outdated version of JNGP?
http://www.wcreplays.com/forums/showthread.php?t=96242
Try changing the color depth of your desktop.
Try to find 1.5e version of JNGP. Try re-downloading and re-installing.
Did you refer JNGP WE to Warcraft 3 WE's folder?
Did you run the JNGP with the Warcraft 3 folder as a WE reference?
I thought JNGP looks for the TFT or RoC so it knows what to open when the user tests the map?
Use JNGP v5e : http://www.hiveworkshop.com/forums/pastebin.php?id=toewcr
Run NewGen WE and a new window will open, find the Warcraft 3 WE's folder then click that folder, NewGen WE will run. If it crashes,then im outta here.
Is this your first time with JNGP?
Either you use a different computer or you keep deleting and re-downloading JNGP or Warcraft.
That' all I got dude.
Buy a new computer. Thank you and good bye.
32 bit color depth setting was used at the beginning...Hmm. Try the 32 bit color depth setting.