No Mails sent AND Internal Server Error

I have just installed and tried to use Powermessenger
Everything seems to be set up fine but I have a few problems.

1. No emails are ever received but PM says there are processed OK
Previews, email verification, mail shots, or Spam reports nothing

2. Any time i try to use the users_registration.php to record a new user the following error occurs, although the user does get added to the database.

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.


Regarding my installation

I have uploaded the files with Dreamweaver as recommended and CuteFTP and neither seemed to make a difference.

I assume that contrary to your instructions the files in the /PowerMessenger Files/ directory of the Zip should be uploaded to a /PowerMessenger subdirectory in the root (in my case /public_html/) and not directly into the root.

In the settings I have used 'mail.XXXXXXX.co.uk' as my mail server as well as leaving it blank neither seemed to make a difference.

I have checked via FTP program that the directory and file exist, and they do.

I have NO problems sending emails through a contact form via my site using PHP. So my server is able to send via the mail command.

The installation procedure showed no errors in database or other config

I am hosting on a reseller package so I have control over any settings.

ALL my other Webassist products work perfectly so I can only guess this is a tiny setting somwher that is stopping the mail getting out


Regards