Still get a black screen and i copied and pasted your code. If i load one of the examples, it works.

Code:

---

///////////////////////////////
#include <acknex.h>
#include <default.c>

///////////////////////////////

PANEL* panDisplay =
{
	flags = VISIBLE;
}

function main()
{
   video_mode = 7;
	screen_color.blue = 150; // dark blue
	
	while (1)
   {
       wait (1);
   }
}

---

Heres a link to a screenshot of what it looks like when i run it. It shows the code on the left and the running app on the right.

screenshot