OS Migration copy error

Copied my OS to new SSD.
Did not boot on restart.
Attempted to re-copy my OS onto SSD. (Thinking I had forgotten an important file or something like that)
With about 33 minutes left to copy OS, prompted to restart computer.
(This did not occur the first time I "successfully" copied to SSD)
Restart and go to very DOS-like copy GUI.
Program attempts to copy OS but runs into problems about 1/2 way through process. Get "Some error occured. Cannot read file"
I assume that the program runs into a problem it did not encounter in the first copy and that is why it tries to copy the OS from earlier in the boot up process.

Question: Why doesnt the program work like it did the first time? I have made not changes to the system since this all took place yesterday. Why am I getting this cannot read error?

I have a Dell XPS 630i Motherboard running Vista. SSD is seen in BIOS but not in Windows. (I could see it in Windows after first successful copy but not since I tried to re-copy it to SSD) SSD is an INTEL 120GB 320 Series. I have downloaded the update to Migrate OS to SSD program, but same results.

ANY help will be greatly appreciated!