blanc admin page, cannot login

[Kyta]

I just installed OScommerce 2.3.1 Dutch through Installatron Applications Installer provided by my webhost.

When I click on the shop, everything looks fine. But when I want to acces the admin page (/admin/index.php), nothing happens, the page is totally blanc....

 

Then I installed an earlier version 2.3.0 in an other folder and with this install I got an admin page and could login. Only when I opened the 'shop-page' there were some errors mentioned in the screen.

The admin folder here was called 'iadmin'.

 

So I tried changing the admin folder of 2.3.1 to 'iadmin' to see if this could be the solution, but still nothing (well, now I got an error code 404 orso, can't remember exactly)

 

So, I would really like to get the 2.3.1 working, but how do I get an Admin page?

Thank you for your help!