deleted file breaks uploading of new files

Hello,

I am a novice to svn but till now I did not run in trouble with it.

Now I do not know where the problem is:
I created (earlyer) a template called /template in the repos.
Today I copied /template to /Laminator using svn copy command. I added the
directory Referenzen and some files under it: /Laminator/Referenzen/Thomas
Pfeiffer/*.
I tryed to commit but I ran in an error. Something about a lock in
the /Laminator directory. Because I thougt the problem was the added
directory, I deleted it in the working copy using system tools and only
copied the /template to /Laminator. The checkin did not work again.
After one additional try I made (just for fun) a svn update. Wow, all my
commits were made first creating /Laminator and the
directory /Lamintor/Referenzen, then it was replaced twice.
Good, let's insert /Referenzen/Thomas Pfeiffer/* again and all is done... But
this was not able to me at all. I got allways the message:
svn: warning: 'Thomas Pfeiffer' is already under version control
I played a bit around with it, but I did not get it work. Even creating a
completely new directory /Laminator/Ressourcen and inserting Thomas Pfeiffer
in it resultet in this message !?!?

If you are interested you can look at the svn repos via https under
svn.wolf-stuttgart.homelinux.net/svn/projekte/Laminator.

I do not know what is the problem and what I can do. Please help me.

Thank you in advance
Christian