Can no longer edit

Question

I will gladly give an Amazon book token for solution. I
bought Con 3 18 months ago but only installed it in last few
months. Now that Adobe have launched Con 4 support not offered, so
I've lost the paddle and can't even find the creek. Worked fine to
start, but now my client (Publisher) receives message : "You
can’t edit this page now because XYZ is currently editing it.
Please contact bla bla".
If I go into Con on my PC I see "You can't edit this page now
because you are already editing it on another computer." All I have
done is obviously pick up text amendments from my client to keep us
both in sync but I have changed nothing in permissions.
No doubt this is simple to you clever geeks out there, but
Life is short and simple here in UK. Help most gratefully received
(and remember the bribe).

Answer 1

this error usually comes up when someone else is editing the
page, contribute is applying the check-in check out feature so that
the the other user will not be able to edit the same page
you will also receive this error when contribute crashes when
a user edits a page.
however if nobody else is editing it, a lock file might have
been generated, which will not let you edit the file because it
thinks that it is being edited by a diff user.
you might want to delete the lock file using contribute or
your ftp server or try following the step below:
To delete a lock file:
1. Using Contribute, browse to the page you want to unlock.
2. At the end of the page’s URL, append the .lck
extension to the filename in the Contribute browser such as
www.mysite.com/index.htm.lck.
3. Contribute displays the File Placeholder Page.
The File Placeholder Page appears when Contribute encounters
a file type that it can’t open.
Because the Contribute lock file is of a special type,
Contribute cannot display it.
4. Select File > Delete Page.
Note: This menu item is disabled if you do not have
permission to delete pages from your website.
If this is the case, you must enable file deletion for the
user’s permission group.
An alert asks whether you are certain that you want to delete
the file.
5. Click Yes to confirm that you want to delete the file.
Another alert appears, warning that you are deleting a
special file and asking if you want
to proceed.
6. Click Yes to confirm that you want to delete the file.
Contribute deletes the lock file and displays the last page
you viewed.
For more information regarding this issue please visit the
URL below:
http://www.adobe.com/go/tn_18571
(here is tech note that might also help)
hope this helps = )