How do u make one track…Each time i record the track goes to the line… I just want to make one long track
What version of Audacity and OS X? Please see the pink panel at the top of this page.
What are you trying to do, exactly? If the problem is that the recording is a flat line (silence), you need to choose the correct device to record from in Device Toolbar . Please see: http://manual.audacityteam.org/o/man/faq_recording_troubleshooting.html#flatline .
If you want to restart recording at the end of the same track, hold SHIFT on your computer keyboard then click the Record button.
If that does not help, what are you recording? What is the recording equipment you are using (make and model number)?