OK heres my problem.............

I know how to do most of the stuff in cool edit but my problem is, is when i want to record i press the record button and the whole song gets slow while i record which makes all of the words off beat.....my question is does anyone know why this is doing this and i wonder if i could maybe lower the quality of the recording to make it go faster or somthing.......i have seen a screen pop up with a bunch of numbers like 40152 and stuff like that but i dont know so PLEASE HELP ME!and if you cant can you give me another software that would work to help record my friends raps.(I need to mix beats with voice!)thank you