connecting to computer

I am having problems with connecting this unit to a computer.  i have it set up the same as my 250d but it wont read it at all.  is there a trick to this im missing?



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If you have come here to find out about the 785D you have come to the right place! In fact the discussion of the BC-785D and how it works is the only acceptable topic on this list. Any discussion about anything other than the BC-785D is OFF TOPIC. I hope this is clear to all group members..