Comping Tool in my Cubase 7.5 doesn´t work

After creating sublanes by cycle stack recording all tutorials recommend easy comping on these by just using the comptool (hand), getting inte the lanes, clicking - holding and choosing parts of the lanes for comping. BUT: it is just not possible to do it in my new Cubase 7.5. Clicking with the comptool in a lane and dragging it for choosing a subpart is not possible in my 7.5. There is absolute no way to do it or is it? Shoud i use a key combination to use the tool or whatever is wrong? Maybe i´m not the only one with this problem…
Thanx, Chris

Solved!! (what a banality but maybe others oversee it also). You must disable “Raster” means “Grid” in English before using the tool. With “Raster”/“Grid” on it does not work at all. BUT i think it also should be an option to keep it on for comping in pre-choosen Grids for special cases…