It sounds like your form is on a web site. If that is the case, you should be able to add the site to your list of trusted sites (in Internet Explorer Tools | Security) and that should fix the issue.

Signature
Greg Collins [InfoPath MVP]
Please visit: http://www.InfoPathDev.com
hi,
I am developing an application from which i am opening the infopath
template (xsn) and filled form(.xml).But it is not taking the browser
credentials.Every time it is asking for the credentials, when i am trying to
open it.How to slove this problem?

Signature
Thank you,
gbs