Finally I resolved the problem and for the other forum members if they have a similar situation this is what I did.
The C10 BOB has among others a DIP switch which controls if the Inputs / Outputs 2-9 should have the COM terminal to GND or +5VDC. My logic was since everything else was checked ok, the signals wiring to the motors perhaps needed the +5V to tell the motors what to do. So I gambled and set the DIP switch to +5V and now the motors came to life.
Hey Hood, thanks for your help very much but since I re installed Mach3, I now have this light on the main screen which says "Abnormal Condition" It's located just below the DRO's. What it means and how can I remove it?