in addition to @browj2 comment, see this topic for the information required on your computer specification - please quote the processor and graphics card /chipset(s) full make/model.
A screen shot of the Program Settings, Display options or Device options tab will help.
Unfortunately, your first post here is to a rather old thread asking about a different Magix product to the one you are writing about and I suspect the OP was actually asking about the play marker not moving, nothing to do with any range set.
As a result, with apologies, I have hidden your post since it is irrelevant to this specific thread.