DtKsh related with Bad Interpreter issue

Question

I want to create a Hello World exmaplo in CDE, as KSH scripting like this and this

I've started on this at my job; there are computers with AIX, so I tested the previous examples successfully. Then I want to try them in my computer with Debian, but I'm having this error:

-bash: ./hello: /usr/dt/bin/dtksh: bad interpreter: No such file or directory

Actually this is my code:

#!/usr/dt/bin/dtksh
XtInitialize TOPLEVEL dttest1 Dtksh $0
XtSetValues $TOPLEVEL title:"dttest1"
XtCreateManagedWidget BBOARD bboard XmBulletinBoard $TOPLEVEL \
   resizePolicy:RESIZE_NONE height:150 width:250\
   background:SkyBlue
XtCreateManagedWidget BUTTON pushbutton XmPushButton $BBOARD \
   background:goldenrod \
   foreground:MidnightBlue \
   labelString:"Push Here" \
   height:30 width:100 x:75 y:60 shadowThickness:3
XtRealizeWidget $TOPLEVEL
XtMainLoop

In addition:

This is what I do when I create and to execute the script:

1. vim hello.ksh
2. After created my file I use chmod +x namescript
3. then ./hello.ksh

Consulted

I've search few information about this: reference1 reference2 reference3 reference4

I used the dos2unix -k -o filename conversor

also the :set fileformat=unix in vim.

How could solve this? I'll appreciate any help, thank you.