When you click on My Task in Project Web Access you receive an error.

Error1:When you click on My Task in Project Web Access you receive an error.
An unexpected error has occurred.
Web Parts Maintenance Page: If you have permission, you can use this page to temporarily close Web Parts or remove personal settings. For more information, contact your site administrator. Troubleshoot issues with Windows SharePoint Services.

Error2: Wnen you do some job in Project server 2007 then the job stays in the Queue. It will show the job that 'prepairing process'

Solutions: The solutions for both problem are MOPS SP2 and WSS 3.0.
download the ServicePack2 for Windows Share point Services 3.0 and Microsoft Office Project Server 2007 and apply that in your Project server.

Download link for MOPS2007: http://www.microsoft.com/downloads/details.aspx?FamilyID=b7816d90-5fc6-4347-89b0-a80deb27a082&displaylang=en
Download link for WSS 3.0: http://www.microsoft.com/downloads/details.aspx?familyid=79BADA82-C13F-44C1-BDC1-D0447337051B&displaylang=en