Im trying to record vocals over a beat but it reocrds the beat aswell, why?

because the microphone doesn't choose what to pick up... wear headphones?

Make sure your recording onto a Mono track in your software, don't choose stereo when creating the track.

What software are you using to record on. Some have sound on sound settings which must be changed to overwrite. Also try deleting sample track or creating a new project or file. If you can give more details I might can help you.

it's not supported on that or any earlier sony software that I know of. have you tried running the program twice (simultaniously) and playing on one while recording on the other then mixing the tracks together after??

Go into Music Settings and see if it has been set to Karaoke. That will make the vocals low

my vocals are off beat when i record why is that.

Tyke, This is likely an issue of your CPU. This usually happens when you don't have enuff horse power (if u will) in your system. Audio engines take a TON of power to run, and depending on your settings and where u have your latency buffer set- you can easily get drop out. You should definitely check this:
http://www.cakewalk.com/support/kb/kb2003175.asp
but u might wanna change u're latency buffer first. think about your cpu speed and what other programs are drawing power.

i have the same probelm as da 1st guy,, when i record my vocals some how da beat sneaks into da mic too and fuccs it up.. seriously its ****

Try this experiment:  Record a click track on track #1.  Record track #2 of the output of a monitor speaker playing track #1.
Now you have two click tracks which will probably not be cooincident (like they should be).
Measure the offset of the two tracks!  You now know your latency exactly, and can compensate by adjusting settings or moving the vocal track back manually that many milliseconds!