Stat has a feature called 'Object Control' which only allow user to add object at a specific status of the workflow. As a result, the add object will be grey out if the user is in a workflow status that does not allow object to be added.
Below are the steps to find out whether or not this functionality is enable:
1. Go to Maintenance | Domain Specific | Workflow
2. Locate the workflow that the csr is using and look for the column called obj control. If this option is check then this functionality is enable.
3. Double click on the workflow | right click at the workflow status and select status rule. If the option allow object add/lock is not check then the read csr, read project, add object will be grey out at that particular status of the workflow.
Notes: If you do not want to use this feature then the obj control option need to be uncheck at the workflow level. Changes will be effective on the new csr.
Stat System Administration Guide | Appendix | Troubleshooting Chart