problems with establishing of account to Fedora

Dear admins!

I am not able to establish an account to Fedora. That is why I can not use IRC.
I ordered these valures:

      Username:   quoty
      Full Name:  Quido Otybela
      Email:          quoty(a)centrum.cz  (2x)

      Further I translated the picture to characters wiht the biggest care too.

But  the system answered to me allways the same:

      captcha: Icorrect value

and the account was not established, the operation ended repeatedly with failure.

I repeated this procedure many times without any success.
My email-address "quoty(a)centrum.cz" is ok and well tested.

What is wrong? I do not understand it at all.

Thank You very much for any advice.