memaycann

I am trying to burn data files on a CD-RW disc. The files burn and are on the disc, however they become "read only" files, so I am unable to alter them in any way. These are all types of files, MS Word documents, MS Works Spreadsheets and Charts. I would like to be able to work on the documents and save them to the CD just as I would on a floppy disk. I am sure it is a setting problem however I am unable to locate any settings to alter. Please help if you can, thank you