Whats going wrong here?

Humm still no luck! keep getting the message: processing.app.SerialException: Serial port '/dev/tty.usbserial-A60049N5' already in use. Try quiting any programs that may be using it.

I am just so lost, if i open the activitymonitor i just don't see any processes or programms that would cause a block to interact with this usb device!

I am sure i done the config right in Arduino software.

Board = Arduino Diecimila
serial port = /dev/tty.usbserial-A60049N5

What should is do anybody suggestions?!?! :-[ :-[ :-[

Thanks in advance