Few things changed in recent versions with regards spindle feedback. First is the timing input is no use, you need to use the Index input, so if you were previously using timing you will either have to use an old version or change your input to a single pulse per rev.
Another thing is make sure you do not have the threading diagnostic plugin active.
Last thing I can think of is you need to have the disable spindle relay box unchecked.
If non of these help attach your xml and I will see if I can find a problem.
Hood