Database trigger causes error in Form

Question

I have a database trigger on the per_performance_reviews table. When I try to save a performance review record from the forms I get the following error:
FRM-40403: A calling form has unapplied changes. Save not allowed.
Any suggestions???
Here is my trigger:
CREATE OR REPLACE TRIGGER APPS.XXPER_UPDATE_PERF_REVIEW
BEFORE INSERT ON HR.PER_PERFORMANCE_REVIEWS
REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW
DECLARE
l_hire_date DATE;
l_next_review_Date DATE;
l_event_type VARCHAR2(40);
BEGIN
select papf.START_DATE, pe.type
into l_hire_date, l_event_type
from per_all_people_f papf, per_performance_reviews ppr, per_events pe
where ppr.performance_review_id = :NEW.performance_review_id
and papf.person_id = ppr.person_id
and pe.event_id = ppr.event_id
and sysdate between papf.effective_start_date and papf.effective_end_date;
l_next_review_date := l_hire_date + (365 * 2);
IF l_event_type = 'APPRAISAL' THEN
:NEW.NEXT_PERF_REVIEW_DATE := l_next_review_date;
END IF;
END XXPER_UPDATE_PERF_REVIEW;

Answer 1

There is a forms forum here too.
However this error message
FRM-40403: A calling form has unapplied changes. Save not allowed.
implies that you opend your current form without posting/commiting in the previous form. This is not allowed. Your changes never even touched the database.