Windows 7 - Problem detecting 2.5" external SSD harddrive

This is part of an ongoing problem for me.

After having no success doing it manually, I have decided to purchase this program
Paragon Migrate to help me move everything onto my shiny new SSD...

Now my problem is that my Windows 7 Laptop will not recognise the SSD (I have it plugged into an external enclosure). Very strange as I can access it perfectly fine from my old Win XP machine upstairs..


Question being - Is there a reason that windows 7 won't recognise this drive? and what can I do to solve the problem?

It's a pain in the ass because I thought that buying that software would be the end to my ongoing upgrade issues.

Thanks in advance.

Shane

Will the HD show in BIOS?


Take a look at this Tutorial:
SSD - Install and transfer the Operating System
SSD Tweaks and Optimizations in Windows 7
SSD / HDD : Optimize for Windows Reinstallation

Not when attached to a USB port (none of my external drives will) but it does when physically inside the laptop