Windows doesn't start when installing HDD

Well just recently I went to install a CD/DVD drive, and the previos configuratoin was as follows:
40 gb HDD secondary IDE channel Master
160 gb HDD primary IDE channel master
ATI Radeon 3870
Pentium D 3.0 ghz
1.5 gb RAM
630 watt PSU
Vista home basic 64bit on my 40 GB HDD

then i hooked up my CD/DVD drive and the configuration was exactly the same but my CD DVD drive was in slave spot under my 160 GB HDD, i started the comp and the drive was not detected, and windows did not start, when i got past the bios screen, my light that shows my hard drive is working was constantly on and nothing was happening. so i removed the CD/DVD drive and got the same result. and after trying many configurations and attemtps to fix it i reinstalled windows vista 32bit. and i re plugged my 160 GB HDD, when windows went to start, it took a little longer than normal to begin loading windows, then it took 6 or 7 minutes before the loading bar dissapeared, but then i got a black screen and nothing, and again the hard drive light was constantly on. so i turned it off and unplugged the data cable and retried many times and have had no success. I really don't know what is going on, before it stopped working i had used it literally 5 minutes before. any suggestions would be much appreciated thanks for the help

Edit: also the drive that vista is now on is my 40 GB HDD and the 160 GB HDD is the one that is having the problems. Also i have tested this HDD in another computer and recieved the same result, except on his computer windows did not even begin to load