Trash is deleted immediately

Hi all,

after installing new CS5 and plugins I noticed today that whenever I like to trash ANY files, the following warning appears: *Are you sure you want to delete the item? It will be deleted Immediately*. If I click continue the file is deleted, and the trash icon is empty.

I was searching in the discussions and found the following thread:

http://www.thexlab.com/faqs/trash.html

I was checking in the file info of the finder and I'm listed as the administrator with read & write permission. There are no other users set up.

I was opening the terminal and here I don't no anymore what to do, without being afraid of doing any major mistakes.
I also don't know how to find the symbol on the keyboard what to type in there.

By the way I noticed in the finders preferences, that "delete the trash safely" was unchecked.
After checking it the behavior was the same.

I hope someone can help me, since I'm living an air travel far away from any next Apple Center.

Thanks