synchronize command doesn't with -delete option

I would like to backup a directory to a server via the commandline. I got it working, but for some reason only without the delete option, which I really need.

What works is:

What does not work is:

The second command doesn't work at all. It not only doesn't delete, but it also doesn't copy any files anymore.
What am I doing wrong?

Thanks.

So what does it do? What's the output on the console?

There is no output to the screen when I enter command B, it just gives back a prompt.

Actually this is the same behaviour as when I enter command A, which also only gives back a promt. But then it does sync the two directories. Problem is that i need it to delete the removed files.

Run:
(note the .com extension)

Yesss!!! That's the trick. Now it works.

Thank you!