I purchased a Gateway LX-6200

Did you load software ? You have a 64 bit Operating System (OS) and MANY companies don't make 64bit software. 95% of PCs are 32 bit. This is same problem other external drive makers are having, Vista 64 bit was sold as "typical" PC when it's for very powerful users. Many "drivers" that talk to the equipment must be written for 64bit software. Check the companie's site to see if it's VISTA 64 bit compatible. Bet it's not ! !