upload problem // linux

i´ve searched the forum for this problem but found no answer.
i am trying to upload a sketch to a arudino ng board usb. i get the following message:
avrdude: stk500_recv(): programmer is not responding
when uploading the sketch i can see the orange light blinking on the board, so i think everything is connected correctly.
and as far as i know, everything else is installed correctly.
does anyone using linux (whatever flavor) have any idea what the problem here could be?
thanks in advance for any help.

sorry for the fuss…i just figured it out!