Hi,
Did you give full trust to your infopath form?
Study the following link,
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odc_ip2003_tr/html/odc_INF_Lab_06.asp
I hope this will help for you,
Thanks.
K.Ramana Reddy / http://www.ggktech.comIndia.