THe external PIDs should have a dash for the controller type.
i.e.
-,TEMP1
instead of just
TEMP1

When you save the PID selections from the BB logging setup window it should create the Options.txt file correctly with the dashes.

Make sure you are using the latest V8.1 release because an older version of the software had a problem that caused it to leave off the dash.

The latest version V8.1.2 is available here:
http://www.efilive.com/index.php?opt...=48&Itemid=133

Regards
Paul