Perhaps Lynch may have more info for the song, and also how it wasn't included on Under Lock And Key, nor the album Back For The Attack?
The first time I got my grubby hands on Back for the Attack was on the B-side of the 12-inch single of Dream Warriors, which also had a remix or re-recording of Paris is Burning on it. This single came out about 8 or 10 months before the album of the same name came out (if I remember correctly).
When the album Back for the Attack came out, I was very surprised to NOT see what I figured would be the title track on it. I found out that the song had actually been recorded during the Under Lock and Key sessions, but was left off of that recording as well. I had a friend who worked at a local record store (not some chain) and together we wrote up a letter and sent it to both the record company (Elektra) as well as the Dokken Fan club asking what happened. We got a reply back from one of the two, but I don't recall who, saying that the song had been recorded during the Under Lock and Key sessions, but was left off becaue the band didn't feel it fit in with the rest of the album. The reason that their 4th album ended up with that name was because the band actually liked the name of the song and simply used it for the album title.
If you listen to it, to me the song actually sounds more like it belonged on Tooth and Nail (their 2nd album) a lot more than ULAK or BFTA. So, perhaps it wasn't just bullshit on their reason for not including it on any album. It really wouldn't fit on BFTA, at least not the recording from that single. It really sounds like older, early 80's Dokken. More raw and not so heavily produced.
Perhaps Pat has better or more accurate information, but this is how I remember it.
I also believe that the song Walk Away was initially available on the Beast From The East live album.
You are correct. It's the last and only non-live track on the album as well as the closing track to Dokken in the 80's.