
Thanks for your help
I fumbled my way to finding out what was going on after I thought that no one would reply

you must've posted just after I checked and lost hope
I have a new problem now:
Please reply quickly

My old pc was an unbelievable hassle! So I bought a new one. It's cool! BUT!!!!! On the old pc which had the Windows XP operating system, I was recording text which I needed to learn and I was saving it in three formats:
1. the data folders that only Audacity uses and likes
2. the .aup project format that I could work on and make changes to
3. the .mp3 format which my mp3 player insists on
I was happy with my work ... all was going well ... then i gave my new pc the modern Windows 7 operating system
I don't know if that's what the problem is . . . i can use all of my files but cannot make changes. I get the message that the file is not writeable. It's even said that the .aup files are not recognised!!
Help, what can i do?