I have got a P4 machine with XP service pack2
I installed dosbox 0.7 and want to use this for accessing operation and maintenance terminal who use a com1 port

here are my config file setting for serial port.

serial1=directserial realport:com1 startbps:9600 parity:none bytesize:8 stopbits:1 irq:4
serial2=dummy
serial3=disabled
serial4=disabled.

and here are the error i get.

DOS box status windows.

config: loading primary setting form config file c:\program files\dossbox-0.70\...
sbox.config
midi:opened device:win32
serial1: opening com1
serial1: serial port "com1" could not be opened.
the specified port is already in use.

please help me to get out of this.
thanks.