When you see the #Name? error this means the CDXStreamer formula addin has become deregistered. You need to see a reference to CDXStreamerUDF functions in the Excel Add in list for the formulas to calculate. This addin and the user interface add-in CDXStreamer are required on your system. To check this use File-Options-Addins in Excel:
To correct this you need to add the CDXStreamerUDF reference back manually but it involves browsing to a file named adxloader.CDXStreamer.dll. The path is the same as the CDXStreamer addin on your system.
If you look at File-Options-Addins in Excel and click on CDXStreamer you will see the addin "Location" in the text below. On Windows 7 this typically starts with C:\Users\[Your User Name]\AppData\Local\Apps\2.0. If you can, take a screen shot and print this out. If you don't see this path make sure your system is set up to view hidden files and folder. In the control panel of Windows 7 click on "Folder Options" and then "View" and select the option to view hidden files and folders.
Then click on File-Options-Addins again and select the Manage function (near the bottom of the dialog) and choose Excel Add-ins. Choose the "Browse" option, select "All Files" rather than Add-ins, and select the path to the adxloader.CDXStreamer.dll file and press OK.
This will restore the CDXStreamerUDF function in Active application addins.
The other alternative is to set CDXStreamer up on another computer using your same username and password. There are no restrictions on setting up the app on multiple computers.