Doesn't matter, just change the key to KMS-client. Then run SLMGR.vbs -dlv, you'll see activation channel changed to Volume_GVLK.
it does not work for me. and then I downloaded and installed win7 32 bit volume license from this forum and i tried to activeite wwith kms server but i got an error. the same error... look at the 1.post on this page