RB-FILTER Problem

I can not seem to get the IN-LIST function to work from my progress
procedure. I wrote an printer report interface to select multiple filter
options for a RB report. I found a tech issue regarding this from
Progress' website and did it as they said, IN-LIST(test field, data1,
data2, data3, ...) but when I execute it says that this is an invalid
filter. Can anyone shed some light on this???

Thanks

Darren Mann
Miller Products Co.