External enclosure compatibility issues

[pollyriddims]

Hello,
I have an old Dell PC Desktop so I removed the hard drive which is a Hitachi Deskstar 80 gb hard drive. it does not seem able to fit in my Rosewill 3.5" SATA rX 35 enclosure?

 

[rolli59]

Is the harddrive SATA? http://en.wikipedia.org/wiki/Serial_ATA