UBB.Developers Forums UBB.threads 7 Development How Do I? spell checker install problem ?

We are running UBB Classic 6.3.1.1
In an attempt to get Spell Checking, I installed the following:

1. Mod Wordlets Install
2. Modifications CP Addon
3. Spell Check

When I click the "Spellcheck" button, I get an Internal Server Error. According to the error_log file, it says it's blowing up on line 47 of spell.cgi, which is: use LWP::Simple;
It also says: can't locate LWP/Simple.pm in @INC.

Does anyone know what I have missed?

Thanks in advance!!!