us/tick problem

[HuangLuxuan]

it seems that midi event 0xFX 0x51 can't effect playing speed. it should change us/tick so the music speed change.

In my java midi-beep project:
switch (e.getMessage().getStatus() & 0xF0)
{
/* Key down/up Program change cases are leaved out here*/
case 0xF0:
if (e.getMessage().getStatus() != 0xFF)
{
System.out.println();
break;
}
switch (e.getMessage().getMessage()[1])
{
case 0x58:
System.out.println((nun = e.getMessage().getMessage()[2]) + "/" + (div = e.getMessage().getMessage()[3]) + " " + e.getMessage().getMessage()[4]);
break;
case 0x51:
long newTickInMicroSec = (((long) e.getMessage().getMessage()[5]) & 0xFF | (((long) e.getMessage().getMessage()[4]) & 0xFF) << 8 | (((long) e.getMessage().getMessage()[3]) & 0xFF) << 16) / seq.getResolution();
time = now - (now - time) * 1000 / TickInMicroSec * newTickInMicroSec / 1000;
System.out.println("Old us/Tick=" + TickInMicroSec + " , and new us/Tick=" + newTickInMicroSec);
TickInMicroSec = newTickInMicroSec;
break;
case 0x7F:
System.out.println("Sending data to device(s)");
break;
default:
System.out.println();
}
}