Hi there Ny,
There's no need for Password FTPs yet, and if there is, it should go to one of the WebAssist techs. If that time comes, then they will open a ticket so you can exchange details in private.
BUT:
In the meantime, let's look at the error and the messages we get.
The first one (your link, - 'http://www.marylingerie.com/CMS/admin/') which says,
"Forbidden, You don't have permission to access /CMS/admin/ on this server." 
is the response you get from just trying to browse a folder without specifying a particular file, UNLESS that folder contains a designated default type of 'main' page, which is usually called 'index.php', 'index.html' or 'default.html' or default.php etc.That folder should contain your CMS/admin/index.php, which should have opened.
So to test it, I typed in, 'http://www.marylingerie.com/CMS/admin/index.php' (same as your link but with the 'index.php' added), and I get the message,
"Not Found. The requested URL /CMS/admin/index.php was not found on this server."
As a final test, I looked for another file that I know should be in the CMS/admin folder, 'http://www.marylingerie.com/CMS/admin/help.php' This time, I get a couple of warning/information messages, which both amount to something like,
"we couldn't open ../Connections/localhost.php which is being requested by line 3 of your CMS/admin/help.php page".
Sorry about the abuse of the quote line, but the meaning is the same, which is that it looked inside your CMS folder for a folder called 'Connections' containing a file called 'localhost.php', and couldn't find it. I couldn't find the Connections folder anywhere on your site. (Root Dir, CMS, Admin).
So I think there is a problem with missing or misplaced files and folders - they may not have uploaded correctly. What I would suggest, is removing all the CMS files and folders from your remote site, and starting from scratch (sorry!).
This time, just upload the entire (preferably freshly) downloaded WebAssist 'CMS102' solution folder after renaming it to just 'CMS' and then upload the whole freshly-named 'CMS' folder 'as-is' to your remote site's root directory. Don't forget to change the WA_Globals.php file to contain details as previously described,
<?php
$WAGLOBAL_Site_Name = "CMS Admin" ;
$WAGLOBAL_localRoot = "/CMS/ "; //relative path to your PowerCMS files on your local testing server.
$WAGLOBAL_remoteRoot = "/CMS/ "; //relative path to your PowerCMS files on your remote server.
// Admin Settings
$WAGLOBAL_Admin_UserName = "yuoradminusername" ;
$WAGLOBAL_Admin_Password = "youradminpassword" ;
?>
Put in a username and password that you will remember during the install process.
Sorry about this, but it will eliminate any doubts about wrong paths, missing files, and wonky structure. It will also probably be quicker to do, than it was to read this.
Post back with how you get on. I may be gone for a bit as it's almost eleven in the morning here and I haven't been to bed yet. I keep odd hours.
AH! Edit: Also, make sure to update the settings in your Connections/localhost.php file with the correct database connection details for your remote database:
<?php
# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
$hostname_localhost = "localhost";
$database_localhost = "YourDatabaseName";
$username_localhost = "YourDatabaseUsername";
$password_localhost = "YourDatabaseUserPassword";
$localhost = mysql_pconnect($hostname_localhost, $username_localhost, $password_localhost) or trigger_error(mysql_error(),E_USER_ERROR);
?>
Cheers
