I'm try to record my voice via the headphone on a Mac Mini, but it's not working. I saw on Apple's site that the Mac Mini can record voice, but it doesn't seem to be working for me.

Here is a hardware overview:

• Model Name: Mac Mini
• Model Identifier: Macmini3,1
• Processor Name: Intel Core 2 Duo
• Processor Speed: 2.26 GHz
• Number Of Processors: 1
• Total Number Of Cores: 2
• L2 Cache: 3 MB
• Memory: 4 GB

Audio:

• Make: Intel High Definition Audio
• Audio ID: 65
• Headphone connection: Combination Output
• Line Input connection: Combination Input
• Speaker connection: Internal
• S/PDIF Optical Digital Audio Output connection: Combination Output
• S/PDIF Optical Digital Audio Input connection: Combination Input

Any ideas how I can successfully get recording working?