LinuxQuestions.org - Enable Serial Connection in Virtualbox

I'm currently using CentOS 6 as my Host. I need to enable Serial Connection to its Guest. My Guest is Windows XP. I enabled Serial in my Host with this settings:

https://lh5.googleusercontent.com/-O...13_1442175.png

However, when I run my Windows XP Guest, it encountered an error.

https://lh4.googleusercontent.com/-r...13_1444176.png

I configure root and admin account to be member of dialout group. admin is also member of vboxusers group.

Code:

[root@server ~]# dmesg | grep tty

console [tty0] enabled

serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

00:0c: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

[root@server ~]# setserial -a /dev/ttyS0

/dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4

        Baud_base: 115200, close_delay: 50, divisor: 0

        closing_wait: 3000

        Flags: spd_normal skip_test

Anyone knows how to resolve this issue?