I recently bough a Geo 3.5 and thought I would connect it to my Eportal to see if any updates were required. Everything was going fine, found 2.20 software, tried to upload it and greeted by an error message that unable to erase and now required reprogramming. Ok, came out of that screen and tried to see what parameters were loaded, again met with an error screen. Came out of that, switched off marker and removed eportal plug, tried to switch marker back on again and met with a red flash from the screen on the marker and noting else. Please help !!!!!