DateAdd & UnboundBox

[mea99sdp]

I trying to use the following formula to add the date, looking up a valbe from another table

=DateAdd([Frequency]![FreqValue],[Frequency]![FreqInterval],[Last Date Done])

table 1
task
start date
freq


table 2
freq=fornight
freqvalue=d
freqinterval=14

anyone see where i'm going wrong?