won't add words to dictionary

[BBran]

I am using Outlook 2007. I have a custom dictionary to use and I have
"suggest from main dictionary only" unchecked. How do I get the spell
checker to allow me to add a word to the dictionary (the button is grayed
out)?

The custom dictionary is: "Custom.dic" in "C:\Documents and
Settings\User\Application Data\Microsoft\Proof", all languages, and
set to default (this one has words listed from my previous version of
MSOffice and is longer). I also have "Custom.dic" in "C:\Documents and
Settings\User\Application Data\Microsoft\UProof", all languages, and
not set to default. The boxes for both are checked, but unchecking one
doesn't help either.

Something else to consider. I installed Spell Checker For OE 2.1,
because after installing Office 2007, the spell checker is OE was using
French.
Could this have anything to do with the problem? If so, I could
unintsall Spell Checker For OE 2.1 but then how could I fix the spell
checker for OE(I use it for newsgroups like this one)? Spell Checker For OE
2.1 was a suggested fix for the problem when I posted that problem on the OE
newsgroup.