Thank you for answering my questions and attaching the XmlSupport.dat file.
Your XmlSupport.dat is missing some Reviewer feature entries. The missing entries are preventing you from accessing your Reviewer Session. Reviewer feature entries are copied to the XmlSupport.dat file during the install of Esri Production Mapping.
Please answer the following:
1. Did you encounter an errors or message dialogs (e.g. Program Compatibility Assistant dialog) during the install of Esri Production Mapping 10?
2. Because you are on a Windows 7 machine, did you install Esri Production Mapping 10 with 'Run as administrator' from the context menu. Open Windows Explorer, navigate to and right-click on the setup.exe for Esri Production Mapping 10 and select 'Run as administrator' from the context menu.
3. When you installed Esri Production Mapping 10 on your Windows 7 machine, did you set User Account Control (UAC) to 'Never notify'?
4. When you installed Esri Production Mapping 10, was ArcMap or ArcCatalog or some other Esri application open accessing the XmlSupport.dat file?
To resolve your issue, please try the following:
1. Uninstall any Mapping and Charting Solutions (MCS) 10 software (e.g. Esri Aeronautical Solution, Esri Defense Mapping, Esri Nautical Solution).
2. Uninstall Esri Production Mapping 10.
3. Follow recommendations 2-4 above and re-install Esri Production Mapping 10. Please make sure that you exit all Esri software before you install Esri Production Mapping 10. What happens?