Much thanks. I started with a fresh installation and enabled just token and workflow-ng (nothing else). It gives error:

Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /home/buser/public_html/uc/sites/all/modules/workflow_ng/workflow_ng/workflow_ng.module on line 625

After searching for this error message I saw a different module where they recommended upgrading to PHP 5. Do you think that is necessary here? (I don't want to mess with too much on my virtual dedicated server if I don't have to.)

Thank you.