White screen on attempting to login

Hi

I've added Perch to an existing site. I've done it on the live server (which I don't normally do) as I'm only adding a couple of forms to a few new page.

The installation went through fine and the tables are in the database etc., at the end when it says you can now login, all I get is a blank white screen

I've enabled php errors on screen and its saying this now;

Parse error: syntax error, unexpected end of file in /path-here/perch/core/lib/PerchAuthenticatedUser.class.php on line 39

I've not used Perch on this hosting before, so maybe something needs to turned-on?

Thanks Wayne