Don't know about beeps, but for me macros work (Ipaq 3800) The only thing is, that discreets need to be sent twice with ca 0,3sec delay in between. All other commands & macros work normally!

Matbe it's only beeps that don't work?

Try a macro: discreet ON, delay, discreet on, delay ,toggle off.
Test this with the device on and then the same with the device off. In both cases you should get the device to be off after the macro. That's how I'm able to say that the macro works for me.