Spell check configuration

Good afternoon,

So I tried to set up spell checking today, but I seem to have made an error somewhere...

I am using linux/aspell/php. In the config file I set: FCKConfig.SpellChecker = 'SpellerPages';

The default binary location was correct.

I cleared my cache and now the spell button is up. When I click it a new dialog comes up, but then I get an error:
System error: Could not open file '/tmp/aspell_data_######' for writing

/tmp is writable... Is there something else I am missing?

Thanks!

Jonathon