It sounds like the program is corrupt on your VFS5. A flashing CPU light means the spindle drive is stuck in autobaud. <Waiting to find the correct com port baud rate>
Here is a link to the software to communicate with your spindle drive from Kollmorgen.
The communications cable you need is 3 wires, NO more. End to end the com's cable wires as follows.
Pins 2-3, 3-2, 5-5
Hope this helps, just IM me if you have anymore specific questions. !