Error message when you try to create an .aspx Web page in a Web application in SharePoint Server 2007: "Access denied"

When you try to use a Microsoft Windows SharePoint Services-compatible editor, such as SharePoint Designer, to create an .aspx Web page in a Microsoft Office SharePoint Server 2007 Web application, you receive the following error message: Additionally, the error message asks you to use a different user name and password to log on to the Web application. This behavior occurs even though you have Contributor permissions for the Web application.

This issue occurs because you have limited permissions for Master Page and Page Layout Gallery.

To resolve this issue, give yourself Design permissions for Master Page and Page Layout Gallery. To do this, follow these steps:

1. Use administrative credentials to log on to the Web application that is hosted on the server that is running SharePoint Server 2007.
2. Click Site Actions, point to Site Settings, and then click Modify All Site Settings.
3. Under Galleries, click Master Page and Page Layout Gallery.
4. Click Settings, and then click Document Library Settings.
5. Under Permissions and Management, click Permissions for this document library.
6. Click New, and then type your user name in the Users/Groups box.
7. Click Give users permission directly, click to select the Design check box, and then click OK.