Its not the code that's wrong, its your paths (okay, I'll concede that that *could* be seen as code :P).
This error: No such file or directory in C:\wamp\bin\php\php5.3.5\Mail-1.2.0\Mail-1.2.0\Mail\smtp.php to the warning: Net/SMTP.php says it cannot load the file located here:
. To start, always work relative, never use full file paths (errors will still show the same though, relative is to prevent locking on directories which requires modification to use on different servers).
Start by looking in this path:
You need to confirm that:
1. A file under .\Mail\stmp.php exists (which appears to me does).
2. A file under .\Mail\Net\smtp.php exists (which does not appear to be).
The smtp is called via the use of Mail::factory (if I had to guess, since that makes sense overall to the idea of a factory).
Assuming this file is stmp.php, change that first line to this:
require_once __DIR__ . '/../Mail.php';
Which should work (__DIR__ only exists in 5.3+, and you appear to be including one directory above).
For number 2, assuming that the file is not there, you're options are to either a) move it there and hope you break no dependencies by doing so, b) correct the filepath which would require modifying the Mail class to register the proper filepaths. If you're really lucky, the filepaths may be a simple configuration issue in another file.