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Problem description

You have enabled the reading pane in Microsoft Office Outlook 2007. However, when you select an e-mail message that is restricted by Information Rights Management (IRM), Outlook may stop responding. This article helps you fix the problem.


To resolve this issue apply hotfix 960535.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

960535 Description of the Outlook 2007 hotfix package (Mso.msp, Outlook.msp): December 16, 2008After you apply this hotfix you must set the DisableDrmErrorCachingWithOM registry entry.

To have us fix this problem for you, go to the “Fix it for me” section. If you would rather fix this problem yourself, go to the “Let me fix it myself” section.

Fix it for me

To fix this problem automatically, click the Fix this problem link. Then click Run in the File Download dialog box, and follow the steps in this wizard.

Note This wizard may be in English only; however, the automatic fix also works for other language versions of Windows.

Note If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD, and then you can run it on the computer that has the problem.

Now go to the "Did this fix the problem?" section.

Let me fix it myself

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 How to back up and restore the registry in Windows

To resolve this issue, follow these steps to set the DisableDrmErrorCachingWithOM registry entry:

  1. Click Start, and then click

  2. Type regedit, and then click

  3. Locate and then click the following registry subkey:


  4. On the Edit menu, point to
    New, and then click DWORD Value.

  5. Type
    DisableDrmErrorCachingWithOM, and then press ENTER.

  6. Right-click
    DisableDrmErrorCachingWithOM, and then click

  7. In the Value data box, type 1, and then click OK.

  8. Exit Registry Editor.

Now go to the "Did this fix the problem?" section.

Did this fix the problem?

Check whether the problem is fixed. If the problem is fixed, you are finished with this article. If the problem is not fixed, you can contact support.

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