Applying encryption with Security Assist and Data Assist

I am endeavouring to apply encryption to a particular site I had originally used Addt on. I have removed all the code that appertained from that programme!

I am presently testing the pages on my local machine.

Having built the necessary pages, following exactly the Solution Recipes in SA, I keep getting the same problem. Having added the php error reporting to the page, the page returns the following error:

Warning: require_once(../WA_SecurityAssist/WA_SHA1Encryption.php) [function.require-once]: failed to open stream: No such file or directory in C:\wamp\www\UpsallStud\assets\users_Registration.php on line 6

Fatal error: require_once() [function.require]: Failed opening required '../WA_SecurityAssist/WA_SHA1Encryption.php' (include_path='.;C:\php5\pear') in C:\wamp\www\UpsallStud\assets\users_Registration.php on line 6

Checking my files - there is no SHA1Enryption.php page to be found.

Thinking I could circumvent this by downloading the Security Assist extension again and disposing of the winfilecache.dat file, I did so. Unfortunately, this didn't help one jot!

Has anyone any ideas on what might be going wrong?

EDIT: I've noticed that in the file extension, it has shown the ph with one space and then p, but this is alright in the code that I cut and pasted!!