So you're trying to move the 'esme' subdomain over to the 'bin' subdomain? I'm not getting a 401 with either one.
If so, you can create a New Fully Hosted Subdomain, and play the rename game:
1) Create 'bin' fully hosted subdomain (panel will create this folder)
2) Rename bin.yourdomain.com oldbin.yourdomain.com
3) Rename esme.yourdomain.com bin.yourdomain.com
4) mkdir esme.yourdomain.com (now your original subdomain will be empty)
I find this to be a cleaner solution than renaming (sub)domain folders. This way the folder naming conventions remain consistent.