I just checked the log, when it went to vote out the post was not votable:
"Can vote: false (slug: @morpheus03/y-all-sleepin-on-some-good-music)" }
You can't vote anything in the last 12 hours (I believe this is to prevent vote sniping and is something related to Steemit and out of my control). I don't recommend voting on something that is within 12 hours + 3 hours to cover the voting window (which is 2.4 hours, but not worth cutting it close).
RE: How to use @buildawhale to get a vote worth up to $3.41