duplex sound

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Ultimate, Service Pack 1, 64 bit
Processor: AMD Phenom(tm) 9150e Quad-Core Processor, AMD64 Family 16 Model 2 Stepping 3
Processor Count: 4
RAM: 3839 Mb
Graphics Card: ATI Radeon HD 3200 Graphics, 256 Mb
Hard Drives: C: Total - 600468 MB, Free - 476533 MB; E: Total - 305160 MB, Free - 281356 MB;
Motherboard: Gateway, RS780
Antivirus: McAfee Anti-Virus and Anti-Spyware, Updated and Enabled

How do I get my sound card to work duplex in msn7