problems with XP and SAVE AS on a CDRW

I am trying to create documents and then use the SAVE AS
feature to save them to the CDRW. It used to work great;
however, now I receive an error and it will not save it as
the origingal file.. It will save it as a temporary file.

I can copy and drag to the disk without problem.

Any ideas why the SAVE AS function will not work anymore?

I am using WINDOWS XP.

Please email me at canimp@yahoo.com