The echo your hearing is "latency". You can lower the latency by lowering the audio buffer which should be somewhere in the audio settings in audition.

If you can't get the latency acceptably low with the onboard soundcard, you will need a proper "audio interface", or you can mute the headphones/speakers or audio track your recording on, while recording the live vocal. Motu M2, and Focusrite scarlett series, are good entry level audio interfaces.

kmetal

Thanks for your response, im yet to work on this issue, as have other pressing work deadlines to meet, but as soon as its done, post back on here and inform you. Thanks again dude