Mario,
Along the bottom edge of the windshield frame is a rubber piece that can be removed easily. Just start at one end and pull it out. When removed, the phillips head screws which mount the windshield frame to the fiberglass are exposed. Check to see if the screws have loosened up allowing the windshield to shift. If not, loosen the screws and shift the windshield to adjust.
There is also a flat rubber/foam piece that is between the windshield frame and fiberglass which could have deteriorated due to age. This could also be part of your problem.
Phil Belcher
2003 266CCR
496 MAG, Bravo 3