[christ30mac]

I have thought of that and I have now set it preferences the old xls format.
I do not think this the problem at some point I have dragged them to the desk top and worked on them and dragged them back again later to my other file. I will not be doing this again. Also when I have worked on a document to save I have pressed cmd + save thats how I use to save in windows. I will not do this either i will click on the save button at the top. The other thing what makes me wonder about the new format of document is that once the file has gone wrong I can not open it on windows or on the Mac. It is very frustrating as I do not know what I am doing wrong. The file also shows up as xls file but it does not show up as preview just a picture of an excel doc. RA-4261-01 16-52-19.xls that is what it is showing as the file name but I can not open it.
Any help would be welcome again only been a Mac user for about 4 weeks please bare with me.
Thanks Chris.