After JSON install PHP is throwing error

[RadNadz]

SOLVED: After JSON install PHP modules doesn't have json.so

php -v gives:

PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/modules/json.so' - /usr/lib/php/modules/json.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP 5.1.6 (cli) (built: Nov 29 2010 16:47:37)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2.1.0, Copyright (c) 1998-2006 Zend Technologies
with the ionCube PHP Loader v4.0.7, Copyright (c) 2002-2011, by ionCube Ltd.

I installed JSON using the directions given here (the non-manual). But it looks like json.so was not installed in the modules dir and find is not seeing any file by that name anywhere on the server. Where can I get the missing file to finish the install? I'm about to rip my hair out. Any help would be greatly appreciated. I can't pull off the bald look...

EDIT: Gotta love misreading an l as a 1.