3 Daisychained Anker 9+1 hubs showing some block erupters as "unknown device"

[Maidak]

I'm now having this issue where after my 22nd device plugged into my anker hub regardless of what it is will show up as a unknown device I have 3 anker hubs 2 of which are daisy chained to the 3rd one. Now it doesn't matter which order they are plugged into or which port anything after 22 of them it will show as unknown. I reset the COM ports in the registry and I've uninstalled and reinstalled the devices so i'm not sure what to do next if anyone knows a fix to it i'd love to hear it.

[nachius]

What version of Windows?  This is a known issue with XP not liking too many duplicate devices.  With  Win 7 or 8 It should just be install zadig driver plug and go I believe.