DBISAM 4 latest, D7 Professional

I am trying to set a table filter using something like:

tblEvents.Filter :=  '(Start >= '+ DateTimeToAnsiStr(Now());

Start is a time stamp. I may be missing the Uses clause for the ansi string
statement but don't know as my help is not available for some reason.
Thanks, Sean

Sorry, put this post in the wrong group...S