Mini6410 Com ports problem

newbie

2011-06-04 17:31:15

hi every body, recently i buy a Mini6410 and i want to use of 3 Serial
ports of this device so when i m using this statement i get 4 serial ports
name 
string[] serials = SerialPort.GetPortNames()

Com2,3,4,5 but i only can open Com2 and Com3 and they works good,but when i
try open Com4 or Com5 i get a IOException,

any idea.