Using pitchbend to create a slide for strings

Hello dear all, recently using Cubase 8 pro and I am busy in editing my strings in pitchbend; below try to create a kind of slide from a low note to a higher note; however, any minor curve I create below under pitchbend results into a major key change so that it all becomes too much and really not natural; I have some samples on video’s where it is easy to draw a curve but with me, it does not work. Probalby some of my settings are not correct?..regards and thanks for your input!