No idea what you did wrong there. Here is an extremely simple example:
Code:
#include <acknex.h>

void main()
{
	sys_marker("WTF");
	void* p = sys_malloc(1337);
	sys_exit(NULL);
}

When you execute this snippet and have a look at the log file it says at the end:
Code:
[...]
Unfreed: 943, WTF, 1340 bytes
Close window at 1.217

Always learn from history, to be sure you make the same mistakes again...