AppleScript problems after last security update

Question

I have to do most of my work on the Mac by speech input, due to arthritis in my hands. This means I rely on AppleScript "programs" to give me short cuts which make life easier. After I installed Security Update 2007-4 I had to re-install some of these programs and found that a few of them no longer work. For example the script below, which should turn off automatic email checking. NB I use MailSmith - and this worked before the Security Update.
tell application "Mailsmith"
get «class AcAc»
if result is true then
set «class AcAc» to false
end if
end tell
Now produces a box on the screen containing:
"Applescript could not compile because
4Can't set «class AcAC» to false. Access not
allowed.." (sic)
Someone tell me what's going on with this, please?
Cheers,
Dave

Answer 1

The script is wrong. Where you see the word "class" in your script, put "property" instead. Now start up Mailsmith and try to recompile the script. It should work.
Alternatively, rewrite the script like this:
tell application "Mailsmith"
get its auto checking enabled
if result is true then
set its auto checking enabled to false
end if
end tell
The "its" is crucial for distinguishing a property from a class.