Problem about AJAX with exec()

[za-nuker]

Hi, all lovely guys here.

I have some problems about exec() function.

I've written PHP Script [using PHP5 Compiler] which is running exec("ping ....."); command [my script is to check whether the service is still available].

And there is one another PHP-page which is the main page and using AJAX to control the PHP I've described above for more than one in the same time. [it means that the main page contains more than one monitor to running exec("ping...");]

But when I open Task Manager, I can see only 4 tasks of Ping.exe in the process list. I observed then, and found that all 10 monitors of mine can run the Ping command only 4 monitors in one time and then switch for another monitor use.

Could anyone help me please. I want to all 10 monitors can run the Ping command at the same time.

Thanks in advance.
Nuke

Excuse for my bad English.