Install wont work

My install wont work.
Im setting trhis up on a subdomain and do not have domain admin access.

Error: Could not connect to the database please make sure the database server, username and password is correct!

that is the error i get, yes the database info is correct.

the directory is sub.host/1!/store

can anyone help

Check you have the latest  version of the script.

Then in install/index.php there is a line 53

if (!$connection = @mysql_connect($_POST['db_server'], $_POST['$db_username'], $_POST['db_password']))
there is extra $ with  $_POST['$db_username']  it should be fixed to
if (!$connection = @mysql_connect($_POST['db_server'], $_POST['db_username'], $_POST['db_password']))

This should of been fixed and uploaded to download.