What is problem when serial don't work?
Here is line:

Call sendserial(getselectedtool())

It seems to get stuck... Have anyone solution?

Are you sure mach will let you get that info from the serial port? I'm not sure if it does.

It doesn't matter what I send to serial port.
*Call SendSerial ("Hello")* doesn't work either...

I update Mach to version 2.60, and now it doesn't get stuck anymore,
but theres nothing happening in serialport.
Mach's Serial monitor works OK,
but SendSerial sub is useless.

I find solution... I Reinstall whole Mach3... That's help...