HELP: DataView Rowfilter issue

[LaoJ]

I defined three Dataviews for the same table to get different rows:
They are : dvFather, dvMother and dvOther
set Filter as follow:
dvFather.Rowfil ter="relationsh ip = 'father' "
dvMother.Rowfil ter = "relationsh ip = 'mother' "
for the third one, the relationship can be "sister, brother, ...
so, I wrote:
dvOther.rowfilt er="relationshi p<>'father' " AND "relationsh ip = 'mother' "

It get run time error"cast from string "relatiobsh ip <>'father' " to type
'long' is not valid."
I have no idea how to deal with the third Dataview's Rowfilter. Anyone can
help ?

Thanks,