Login dosn't work

[bermar]

Hi, I'm sorry wrong one can read the text bad, but I translated it using Google translator, because I could not help in the German forum.

Here's my problem
I first want to say that I am new to the area of the Presto stores, but I have worked with XT and OsCommerce.
Since we own a CMS written (in ASP) have, we are now looking for a good online shop running without problems on an IIS, and where you can change the templates relatively easy, and I came across the Prestashop.

Installation, and import of the German language worked out great, but I now have the problem that I registered as a customer while, but I can not LOGIN. He says not even an error message that he does not answer a call.
I get the confirmation email sent with my password in the admin area also see the user and he is also activated.
When I use the wrong password text box that I get the error message that authentication has failed, but when I enter everything correctly then it reports to me not.

Do I need to set something somewhere that you can log in?
Here is the link: link

Thx bermar