Toad 10.6 and Windows 7

I am using Toad for Oracle 10.6 with Windows 7.
I am unable to edit existing scripts (procs, views, etc.)

For example, if I ‘load to editor’ or “Alter View”. The editor acts as if it were read only.

However, if I just open the editor, and paste to it. I can execute it, but I canot edit the text after that.

What is causeing this problem, and how can it be corrected?

Thanks in advance.

Have you checked the ‘Read Only’ option on your connection ?