There is a known issue with Microsoft Office 2007 & Remote Desktop 6.0 that conflicts with file saving.  This information is located here on Microsoft's Web site:

http://support.microsoft.com/kb/936970/en-us

Note: We provide links to third-party websites in an effort to help you resolve your issue. We are not responsible for the information on third-party websites, and we cannot assist in implementing the solutions on these websites.