An order unexpectedly becomes read-only if a workflow rule or an SDK application changes the status of the order to "In Progress" in Microsoft Dynamics CRM 4.0

If a workflow rule or a Software Development Kit (SDK) application changes the status of an order to "In Progress" in Microsoft Dynamics CRM 4.0, the order unexpectedly becomes read-only. This problem occurs if you have installed Update Rollup 6 for Microsoft Dynamics CRM 4.0 or Update Rollup 5 for Microsoft Dynamics CRM 4.0.
For more information about Update Rollup 6 for Microsoft Dynamics CRM 4.0 and Update Rollup 5 for Microsoft Dynamics CRM 4.0, click the following article numbers to view the articles in the Microsoft Knowledge Base:

This problem occurs because the state of an order is changed to "Submitted" when a workflow rule or an SDK application changes the status of the order to "In Progress." Therefore, the order becomes read-only.

This problem is fixed in the latest cumulative update rollup for Microsoft Dynamics CRM 4.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

If you have installed Update Rollup 6, you must uninstall Update Rollup 6 before you install the latest cumulative update rollup for Microsoft Dynamics CRM 4.0.