Installation works fine; a strange message appears

Installed the Cosmetics VM template this afternoon and everything works fine. After finishing the installation (as-it-is) I walked around in my shop and I ordered 2 example products. After clicking on the shopping cart, I received a strange message (see attachment).

Went something wrong during the installation or did I miss a setting somewhere ?

Grz. Paul Zaal (The Netherlands)

Please give us your live link so we can inspect that. Also, check your Joomla version (current is 2.5.6) and VirtueMart version (current is 2.0.8c).

Joomla + VM version installed by the Hotstart method.

Last night I did a fresh installation and I figured out that the problem has something to do with the currency. When I change the currency to British pounds a blank screen appears on the productpage. The only solution I found was to restore the original code directly in the MySql-table (phpmyadmin).

There is another strange thing (I suppose) :
VM tells me in red that there is no user 42. And that's right because the superuser is 942 (in Joomla)

Here is the live link : www.beauty2dayshop.co.uk (that's right ==> it's an UK webshop hosted/built in The Netherlands). For your convenience the currency is set back to dollars again.

If you want to, I can give you full backend acces by email (no webshop specific data, modules or whatever is added yet; it is as it is deliverd).

Grz. Paul Zaal

When I browse your link I get:

Forbidden

You don't have permission to access / on this server.

Also you image is to small so i can't read what that messages say, but since there are on blue bcg I think you have set messaging level to higher that default, lowering that back should solve issue.