Connecting to iSCSI on Windows 2012 Box

I have been trying to get iSCSI set up on my network with little success.  I set up the target on a Windows 2012 box and I can get other Windows 2012 boxes to connect but not my ESXi 5.1 box.  When I try to connect, I get a login failure event (0301) and nothing happens.  Is there anything special I need to do to get this to work?

Thanks

Bert