Virtumart used as a catalogue, after provision shop in error when ordering

[Jufi1968]

Sorry, my English is not so good, I hope you can understand my question:

I've testing grounds to catalog the shop and ran as well as everything I wanted.
Now I wanted to undo it again, but if you are in the basket in order to click an "error page-loading site called The head of the inquiry so that they can never quit."

Can one help me? Have run Joomla 1.5.3 and 1.1.0 Virtuemart

Many greetings

Jufi