I can create promotions with certain conditions, but get an error when trying to
do a promotion for a specific product.  I get a fatal error when trying to add
the promotion.  I've uninstalled and re-installed the Promotions and Products
module several times to make sure this isn't a corrupt file.

Conditions that cause the Error:

1. Go to Extensions->Promotion Mgr
2. Click "Add a New Promotion"
3. Fill in name "Test"
4. Leave date settings alone.
5. Set conditions to "Require purchase of specific product".  I use product
number 4 (have verified it is there).
6. Click Add.  It appears now under the conditions.
7. Use default discount (percentage off, .1)
8. Click "Submit"

The following Error is Produced:
Fatal error: Class 'product_ops' not found in
/var/www/vhosts/cagt.org/subdomains/test/httpdocs/modules/Promotions/action.admin_addpromo.php
on line 126

Versions:
OS Linux
PHP 5.9
MySQL 5.2
CMSMS 1.6.6
CGExtensions 1.17.6
FEU 1.6.11
Products 2.4.6
Promotions 1.0.5
Orders 1.6.12

Other Notes:
I have verified that the class.products_ops file does exist in the Products
module.  Permissions are correctly set for modules folder.  Normally at 775, but
I've been testing with 777, and get identical problem.