Help - Can’t change any Back Office settings

[novovox]

I have just installed Prestashop. I got to the Back Office configuration and changed a couple of settings as follows:
In Preferences I changed PS Directory from: /prestashop/ to: /shop/
I selected "yes" for friendly URL then changed my htaccess.txt file to .htaccess as the instruction said.

Now, whenever I try to change any settings in any part of the Back Office it goes to what appears to be a failed CSS load of my html 404 error page in my CMS.

I also notice that the url reads:
http://www.mysite.com/shop/ashop/admin197/index.php?tab=AdminPreferences&submitgeneralconfiguration=1&token=f6b5955242ec7046857ed93d70069e47

I don't know why it would show/ashop/ between /shop/ and /admin197

Any insight or solution would be very welcome as I am trying to get this running in the next 24 hours.

[afgclassics]

I am having the same problem I was trying to fix a couple of things and I came to the PS Directory and I happened to change the directory from blank to /afgclassics/ Now that I view my website its completely messed up. I cant see any images or anything. Can anyone help us??

Please get back to me Asap, I have commercials running 24hours a day and I have a lot of traffic per day, and cannot afford for this thing to be down?

Please help! I really appreciate it!!