All sorted, basically as above
The chap in my local model shop (who uses a SkyRC Toro) downloaded the TrackStar software & initially set the ESC to blinky, as required. He then realised the firmware in the card was older than in the ESC, so updated the card first, all good with card now connecting to ESC. So then installed the latest firmware to the ESC too.
So just a firmware mismatch.
Thanks for the above help chaps