Like Jimmy said it is probably that your bevel is not set good. Will the razor shave arm hair? If not you might need to look into getting a 1000 grit hone and reset the bevel. You can reset the bevel on the 4000 stone it just takes a long time. If your bevel is not properly set all you are doing is polishing a dull edge. For me when I get a proper bevel on my 1000 grit hone the razor will easily shave arm hair for the entire length of the blade. Only then do I move on to the 4/8 for further polishing of the edge.

Hope this helps and good luck
Stephan