Resolution
This behavior can be caused by installing Microsoft Project 2002/2003 without uninstalling Microsoft Project 98 or 2000. It is always a good idea to uninstall earlier versions of Microsoft Project before installing Microsoft Project 2002/2003. If you already have both versions installed, uninstall both versions, and then reinstall Microsoft Project 2002 or 2003. If you continue to experience this problem, complete the following steps:
1. Launch Microsoft Project
2. Click Tools - Customize - Toolbars
3. Click the Commands tab
4. In the Categories list, select the Tools item
5. Drag the COM Add-Ins item from the Commands list and then drop it on the Tools menu below the Macro item
6. Click the Close button to close the Customize dialog
7. Click Tools - COM Add-Ins
8. In the COM Add-Ins dialog, perform one of the following actions:
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To load an add-in, select the check box next to its name
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If the add-in you want is not in the list, click the Add button, locate and select the add-in, and then click OK
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To unload an add-in from memory but keep its name in the list, clear the check box next to its name
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To remove an add-in from the list and from memory, select it and then click the Remove button
9. Click OK when finished
For more information about this problem, click to the following link:
http://www.mvps.org/project/faqs.htm#Analysis Toolbar (Project 2000+)