Subsonic plays locally but not on iSub, moved music drive

I moved the hard drive I store my music on from one USB drive to another. I went to the Subsonic options and changed the directory path to the new location and the music plays just fine on my server's browser when accessing my Subsonic server.
When I log into my server using the iOS app iSub, the library is available but the music will not start playing.
My server location is correct (http://serverip:4040). My internet router's port is forwarded to the proper internal static IP for my server.
Running the latest server version on OS X Yosemite on a Mac Pro.
I removed the server from iSub and re-added it.
Any ideas?
Thank you.
When I log into my server using the iOS app iSub, the library is available but the music will not start playing.
My server location is correct (http://serverip:4040). My internet router's port is forwarded to the proper internal static IP for my server.
Running the latest server version on OS X Yosemite on a Mac Pro.
I removed the server from iSub and re-added it.
Any ideas?
Thank you.