Second track not recording

Hi, everyone!
I record some voice, then click stop and when clicking rerord again Audacity makes new track but doesn’t record anything. What should I do to solve it?

Sorry but you have not really given us enough information. Start by giving us the information requested in the pink panel at the top of the page.

What is the make and model number of the mic and how does it connect to the computer?

Are you also trying to record the mic in the second track? For each recording you make, you need to use Device Toolbar to choose the actual device or source you want to record from.