Windows 7: You do not have permission to access. Contact your network admin

The are 3 PCs, all Windows 7, all the same workgroup, two of them same homegroup.

Problem. Try to share a folder on RAFALEK-PC, created account user/password, set permission etc. And one PC (not in the homegroup) when try to connect , gets window asking for user/password and when enter user/password everything is OK. got access to the shared folder.

Problem with another pc : Jacubek-PC (same homegroup with RAFALEK-PC) when try to get access to that folder gets network error:



checked cmd - use net (see attached picture).
I tried : "net use* /delete" but it does not help.
Only when I connect via: "\\ip of server\folder name" everything works as it should.

Please how to get rid of this annoying error.
PS. same problem when RAFALEK-PC try to access some folders on JACUBEK-PC.

Try to turn off Password Protected Sharing ?

But I would like to have password protected on. As I wrote. There is a third PC and this one can access shared folder on Rafalek-PC. Got window asking for user/password and everything is OK.
As you see if I use IP of Rafalek-PC instead of "Rafalek-PC", I can connect in the same way as described above PC.

I would like use names not IPs as IP could changed (of course I can set static IP for pcs but this is not case)

edit:
Just find out what cause the problem : "homegroup". If you are in the same homegroup with another PC, you can not connect to the share folder (not homegroup share folder) as windows create another connection (see net use). When I leaved the homegroup I can connect to the share folder as I wanted.