Ok, stupid question, as I had a conflict in my access database, infopath had nothing to do with it.
However, for the record, I am just going to abandon infopath for this reason; you can't design a form integrated in a sharepoint thanx to their infopath webpart and connected to an access database. Therefore, when people connect to the sharepoint, each of them have to have infopath installed on their computer to be able to open the form, instead of having it embedded and be able to submit/query/edit information.
Another way of forcing people to buy more microsoft products...