Thank you for your fast responses. I did what you said. First, I deinstalled all. After this I tried again. I istalled Lyx with the lyx-installer and aspell was installed automatically, too. afterwards I installed a german dictonary. but it didn't work. So I deinstalled all again. now I installed aspell first and after this lyx, who found aspell. but it also didn't work. so i tried to run aspell in a console with success. so, i think, the problem isn't the spellchecker. do you have some other ideas or you see something I made wrong?
regards Christopher -- 10 GB Mailbox, 100 FreeSMS/Monat http://www.gmx.net/de/go/topmail +++ GMX - die erste Adresse für Mail, Message, More +++