Unable to enter the data through a form.

[zixingw via AccessMonster.com]

The form's recordsource is a query. That query is an inner join query (data
from two tables)
I am unable to update the data through the form. I looked at the query and
tried to update it. I failed to update, so I changed the query properties:
Change "Dynaset" to "Dynaset (Inconsistent Updates)"
I was able to update the data through this query, but I still unable to
update the data through the form.

Any one can help me to resolve this issue. Note: Access version is 97.

Thanks,

Zixing Wang