[HELP]DTXconverter not working

-.- Ok like i said the DTXconverter is not working for me

I followed all the instructions in this fourm ->http://www.mpgh.net/forum/210-combat...-tutorial.html

But when i get to the converting back .... nothing

my steps....
1st step convert, useing DTXconv, to lith tech
2ed step Edit texture, Done
3ed step try to Convert it back to Nexon
4th step Not working..."Blah blah Blahh...(Not Responding)..."

when i open DTXconv for that file, it just stays blank, But other files work converting To and Back, When i dont Edit them, Idk why.
Only the Files that i Edited dont work

someone, anyone ...help o.o

this is my first Texture

i would greatly appriceate it, thnx