thanks very much for your submission, and hopefully we will see some more soon!
Have you cleared with Hinshaw Music any permission required to post the sample of your work? They obviously would have negotiated some proprietary rights involved with their publication of it. I am not a lawyer and not even based in the US, so I won’t offer any advice, however, I'm not prepared to unblock the work without some more information.
Would it be possible to post the entire work under the CC Non-commercial No Derivatives licence? (I’d estimate the possibility of Hinshaw Music agreeing to that as somewhere between nought and zero, but I thought I would ask anyway.)
(IMSLP Copyright Review team)