Windows Server 2012 network shares are uncessibile for some machines

I have a little problem with new installation of Windows Server 2012 and I can't figure aut any solution for it!

I had have Windows domain with two DC running on Windows Server 2003. Recently I demoted one of them and added quite new machine with Windows Server 2012. Then I have promoted this new server do DC, moved to it all AD services and roles (now I have 2 DC, one W2003, one W2012 and one W2003 standalone member server).

All works well, dcdiag do not return any errors, but folder shared on new server W2012 (including system shares) are not visible from both servers with W2003. Name of new W2012 server is properly translated into IP on both W2003 servers (both by IP and NetBIOS) but command "net view w2012_name" return error 64 ("the specified network name is no longer available"). At the same time, folder shared on W2012 machine are visible from clients computer (with W7 but not form XP). I know that it may be an issue with SMB 2.0 protocol which is unsupported on older OS, but it should then be negotiated to use SMB 1.0. I rather don't want to disable SMB 2.0 at all.

I have already searched the web, but found nothing helpful. In the past in my network there was a server with the same name as new W2012 server, but for long time it doesn't exist and was deleted from domain many year ago. Maybe somewhere in AD, there are any obsolete objects with this name, causing my problem? (How could I check this?)
Any help will be appreciated.