database logon window when using an xsd as the datasource [i am so frustrated with this]

can someone please tell me why a logon window pops up when i try to set the data source of a report to an xsd dataset. there is no logon information and if i hit cancel the report displays fine, this is just annoying an i can not tell clients to just ignore it. it is unacceptable some one please help, i need to either figure out how I can get this window to not show up, or how i can get the xsd to recognize a user name and password and then programmatically set all the info. I don't want the client to have to see this window as it is unnecessary.