Automatic log off of idle users

[SuePee]

I need to be able to log off idle users on the databases I write. So I looked in the faq section of this site and found exactly what I needed. (faq181-1432)

However, when I copied the code into my database it did not work. I receive the following message:

The expression On Timer you entered as the event property setting produced the following error: Syntax Error.
*The expression may not result in the name of a macro, the name of a user defined function or [Event Procedure]
*There may have been an error evaluating the function, event or macro.

I am really handicapped when it comes to this type of thing, so any help would be greatly appreciated.

Thanks a bunch

SuePee