error when trying to add ecommerce

I am attempting to create a Drupal instance by using CVS, and I keep getting an error when I do it.

I downloaded the core functionality without any problem by using this command:

cvs -z6 -d:pserver:anonymous:anonymous@cvs.drupa.org:/cvs/drupal co -d MySite -r DRUPAL-6-13 drupal

I created the database and got Drupal to connect to it without any problems.

I have downloaded the modules I needed using this type of command:

cvs -d:pserver:anonymous:anonymous@cvs.drupal.org:/cvs/drupal-contrib co -d ecommerce contributions/modules/ecommerce

There were no errors. But when I try to enable the ecommerce related functionality, I get this error:

Fatal error: Call to undefined function ec_anon_policy_list() in /Users/roger/Sites/toys/modules/ecommerce/ec_anon/ec_anon.install on line 57

I saw an issue report about this error (http://drupal.org/node/353601), and the report stated that the problem was fixed.

I have an instance of Drupal that I created by downloading and unzipping and it has these same modules. It works fine.

Does anyone have any suggestions as to how I can get around this error, or how I can figure out why it is happening?

Thanks in advance for any help you can provide.

NEW INFORMATION:
I have isolated the module that causes the problem. It is the Anonymous Purchasing module. If that module is disabled, I don't get an error...as soon as I enable it, I get the error.

Any advise would really be appreciated. I am completely shut down until I can figure this out.

Thanks.