Can't record sound.

Hello, I have just registered to your site. I am having a problem with getting my microphone to work. I have an old mic that plugs into the sound card, and I also have a USB Logtech. The mic that plugs into my sound card works but I can’t get the voice to record. I have tried to access help and settings but to no avail. I get this message"Error while opening sound device. Please check the input device settings and the project sample rate." I am confused. I would appreciate any suggestions. Thank you in advance, kejoca

The help files are no longer included in Audacity, but are available on line:

If you still require assistance, could you re-post this question on the board that is appropriate to the version of Audacity, and the operating system that you are using.