Coastal Water textures not correct

Got a new PC and have started installing my old and some new sceneries again.Amongst others VFR ground textures for the Netherlands and other Ground Environments & Ultimate terrain.I have started making a a few flights and found that the coastal area's like the attached photo's is very strange.It seems that a scenery patch is missing or altered.In the Scenery Library I have ticked out most of the above mentioned sceneries without any change.I think this problem occurred on my older PC but I do not remember how it was fixed.Hoping somebody can help.