Error when recording sound with Audacity

hi,

i am using hardy 8.04 and i am facing problem with Audacity 1.3.4-beta when i try to record sound it gives the following messg. i dont have mic with my system and i was trying to record a track played by Mplayer

Expression 'ValidateParameters( outputParameters, outputDeviceInfo, StreamMode_Out )' failed in 'src/hostapi/oss/pa_unix_oss.c', line: 1210

the following info i got from audacity help-audio devices

==============================
Default capture device number: 0
Default playback device number: -1
==============================
Device ID: 0
Device name: OSS: /dev/dsp
Input channels: 16
Output channels: 0
Low Input Latency: 0.011610
Low Output Latency: 0.000000
High Input Latency: 0.046440
High Output Latency: 0.000000
Supported Rates:
==============================
Selected capture device: 0 - OSS: /dev/dsp
Selected playback device: 0 - OSS: /dev/dsp
Supported Rates: 8000
    16000
    22050
    44100
    48000
    96000
==============================
Available mixers:
==============================
Available capture sources:
==============================
Available playback volumes:
==============================
Capture volume is emulated
Capture volume is emulated

also when i try to record it give the following info

Stream is active ... unable to gather information.

thanks

James