How to recover the trust between parent and child domain if Access is denied between them happened

that's becasue the TDO ( trusted domain object) has been corrupted as i have been informed once from Microsoft

Busbar, one of the Experts out there, blog that wonderfull post and i wanted to share it with you

http://busbar.blogspot.com/2008/03/what-to-do-parentchild-domain-trust-is.html