unsuccessfully, trying to hook up laptop to a sanyo PRO xtrax multiverse projector. recently updated to latest mac book pro, so im using a brand new mini display port to VGA adaptor attached to a 3 ft VGA cable (that i had and have always used) that is going into the projector. the computer is detetcing the VGA display but the projector says 'no signal'. i have tried all the menu options. not sure what i may be doing wrong, any ideas why this is happening?