If your using a tactrix cable you should be able to plug one end of cable in to the OBD port and the other to USB input on your laptop. I downloaded all the drivers wth version of ecuexplorer(3.0.25).
on the left hand side of the ecuexplorer window there is a section on the bottom that says, "port, assinged to, and port description" Make sure your cable is plugged into the COM port and select the COM port in that small window on the bottom left. right click will bring up a dialog box where the only option is "SSM Diagnostics", select it. Now, usually ecuexplorer will bring up a prompt that says you must re-start ecuexplorer for the changes to take place. Restart ecuexplorer and check to see if it says SSM Diagnostics in the bottom left window. If it doesnt work then change COM port and try again. If it does then click, ECU in the window on the left above where we made the com port selection, and then realtime data view. This should bring up all the viewable parameters on your ECU. click on those parameters you want to monitor and right click, select "activate log by defrost button", i havent done this since i ste mine up but i think you need to right click and select the defrost for every parameter you wish to log.
you have to push the defrost button on your dash to get ecuexplorer to start logging, push it again to end log
logs are automatically saved as excell files
Goodluck with datalogging, if there is anything else you need let me know