External Hard drive not showing up in 'My Computer', and 'Disk Management'

Zephyrus

TS Rookie
The Seagate Momentus 5400.6 hard drive I'm using is from my old laptop it has 4 disks.
After I put it in the (IT-CEO IT-700) enclosure, and connect it to my new laptop it does not show up in 'My Cumputer' and 'Disk Management', but displays in the 'device and printer' section of control pannel.
I also can't eject the hard drive, even when I'm not doing anything to it, the (IT-CEO IT-700) enclusre's blue signal light just keeps flashing for a while then goes off for a sec, then resume flashing again.
My laptop also keeps trying to install the hard drive.

I tried reinstall the hard drive's driver, but that did not solve the problem.

Please Help.