Ok i have this western dig hard drive that i put win xp on in jan. and i have not used it at all since then. I go to use it now and it makes a sound like it reads the disk but only louder and more high piched. ALso the pc does not read that it is conected to the pc. Is it bad ?

I agree, check the connections, making sure both the power connector and the IDE cable are properly connected, if possible try another IDE cable. I have found that many times a faulty cable can make a drive act like it is dying.
Have a look here as well http://www.techspot.com/vb/showthread.php?s=&threadid=7602

I have used two ide cabels and nothing but even with out them and only with power it still dose nothing

Do you thinck the Warranty would cover this? and it makes a clicking sound now

if its under warranty the yes.
I would recommend running WD's drive diagnostic utility though, or attempting to.

Definitely run a diagnostin utility on it...and check disk administrator to see if XP has any status displayed on the drive (when you installed it, I take it you formatted it successfully etc?)

well the pc dose not detect the drive so i can not run a check. So i will just use the warranty.