Enclosure NexStar 3 doesn't spin my hard drive

I have the NexStar.3 (usb2, 194a/b, esata) running a 1tb seagate as logical and storage drive.

I'm having problems to recognise my hard drive from my windows xp sp2. the enclosure boot fine but the hard drive doesn't spin. It happened before to me when i was using the usb2 connection and i though that the seagate died on me but fortunately i was wrong and the enclosure did recognise again my hard drive.

now I am using the esata connection and everything was working fine but not for long. I restarted my computer and again the enclosure is on but the hard drive is not spinning.........I tried to turn off everyhting and boot again but still the same problem.

what is that? I was thinking enclosures are supposed to make our life easier not complicated.......the real problem is u don't know where it is...sometimes it work fine... sometimes not................I am 100% sure it is not my hard drive but I can't find a solution for it.

I went to vantec website and they don't have answers for my problem....yes it's connected from the back and not from the front and the hard drive is 1TB and not over that so it should work fine.

I have a new build system:
Intel DX58SO MB
Intel i7-920 CPU
XFX ATI Radeon 4870xxx GPU
3x1gb Kingston Rams
750w Pc power and cooling
Seagate drives
NZXT Tempest Case

no overlocking at all so my system is brand new and running fine except this little problem!

anyone found a solution for it?

thanks

for what it's worth, I have the same problem
I'm pretty sure that the Hard Drive is screwed.
If you put another drive into the enclosure, does it work?
My HD gives a grunting sound every second but when I move the drive/enclosure it's clear that the drive is not spinning (no resistance to my efforts to twist the drive in space).
For you, the fact that it works periodically "might" mean you can get your information off before it's completely pooched.
If anyone has a suggestion, that would be great but I'm guessing Dead Drive is the Diagnosis.
Nitrous