Need some serious help getting this wired up. I pretty much followed this diagram but I am having issues. Either only the humbuckers work or only the single coils work. I am using a dimarzio bc1 in the neck, some chinese single coil mid, and a jb seymour duncan in the bridge. 

I am also using an in line 5 way switch, the ones typically found in ibanez guitars too. To my understanding the lugs are the same if you follow them in order

Basically if I have the lug 7 wired to ground the humbuckers work, and if I have it wired to hot on the volume pot. only the single coil works.
I just realized that lug 4 is missing, I have the hot from the volume over to lug 5. could this be a problem?