Depending on how you reinstalled Vista will determine whether or not you might be able to recover your files.
If you did a wipe and fresh install much of your wanted files will have been over written in the process.
Plus you will have lost the Vista encryption certificate needed in the recovery process.
(I'm guessing you did not back up your files or the certificate either.)
There are some companies you could send your hard drive to for a chance at some partial recovery, but this costs in the thousands of dollars without any guarantees.
Every time you use that computer you are over writing old material.
You might read this article which explains how to Rescue Encrypted Files With Windows Vista
(Possibly) if you can still see the files and can find the certificate.
I wish you luck.
The only easy day was yesterday.
...some do, some don't; some will, some won't (WR)