Interfacing with Flash CS4

I'm attempting to interface my Arduino with Flash, but I'm running into some problems. I run Serproxy, but when I try to run the flash file the Dos window for Serproxy outputs..

Server thread launched
server(4) - thread started
Failed to open comm port - connection refused

I'm not sure what the problem is. In the arduino IDE I use com4 to program so I figure that its the same. Below is the also the config file for Serproxy..

Hope I can get some help on this,
Thanks

# Config file for serproxy
# See serproxy's README file for documentation

# Transform newlines coming from the serial port into nils
# true (e.g. if using Flash) or false
newlines_to_nils=true

# Comm ports used
comm_ports=1,2,3,4,5,6

# Default settings
comm_baud4=57600
comm_databits4=8
comm_stopbits4=1
comm_parity4=none

# Idle time out in seconds
timeout=300

# Port 1 settings (ttyS0)
net_port1=5331

# Port 2 settings (ttyS1)
net_port2=5332

# Port 3 settings (ttyS2)
net_port3=5333

# Port 4 settings (ttyS3)
net_port4=5334

# Port 5 settings (ttyS4)
net_port5=5335

# Port 6 settings (ttyS5)
net_port6=5336