Spellchecking / Aspell problems

[jezZiFeR]

Hello,

I installed the mac developer tools and Aspell, but I couldn´t get  
spellchecking to work. Do I have to install dictionaries first? How?  
Spellchecking doesn´t even work in english… Here is the message I get  
from Lyx (1.6):

Das Rechtschreibprogramm konnte nicht gestartet werden
Error: The file "/usr/local/lib/aspell-0.60/english" can not be opened  
for reading.
(German: Spellchecking could not be opened)

What could I do that it works?

Thank you
Jess*