Transfering to a Dyna Myte through the RS232 using Cimco Edit

I can't get this to work; I must be doing something wrong. I have a
computer with only Cismo edit on it with a small program that I have
made from mastercam and posted it with the correct post on to cimco
edit. I have configured the DNS settings in Cimco edit so I can use
the DNS transfer program in there:
Baud rate 2400
Stop bits 1
Data bits 8
Has anyone done this before on a Dyna Myte 2800 or 2400 (They have
the same control) I would like to write programs in a cam software
package, post them and than transfer them across the RS232 into the
machine? I think that I have everything configured correctly but it's
still not working. I have the cable configuration correct or so I
think, I got the original configuration from Dyna, I have tested for
signal and it's definitely sending signal to the machine but the
machine controller is not responding.

Any ideas?

I don't know much about these Dyna Myte mills however, any help would
be much appreciated.

What are my options here, I know that there is a AHHA retrofit, but I
would prefer to solve this without having to purchase the retrofit
because it works in dos and I would like to keep running windows xp.
Are there any other retrofits out there for my machine?

Thanks for the help, it's much appreciated.