Madilu,
Possible problems for poor Dragon recognition include a broken/breaking wire in the microphone, input level set too low (start> Control Panel> Hardware and sound> manage audio devices> recording. Double click on your microphone to set the level). If you are using a laptop in addition to a headset, disable the laptop microphone if it has one. Positioning the microphone is critical for good recognition accuracy.
If you're not using a USB microphone, you may have a problem with your sound card. A decent USB microphone can make a huge difference in recognition accuracy. I've been very happy with my Andrea NC-181VM USB, about $45 on Amazon. I use it with Dragon Medical Practice Edition version 1 with really good accuracy.
I hope this helps. Good luck!
Norm Numerof, M.D.
