Thanks to the both of you. The counter works (although I don't see the logo on my webpage, but that's o.k. with me)

I tried pasting the code, but where you are supposed to see the counter's logo, you still see the whole code.
I will otherwise try your other option, although it sounds quite technical...

I am a real novice in in using serendipity and haven't got a clue how to import a onestat code into my website.
Thanks!