sharing problem from OSX mavericks to windows 7

I want to acces a windows 7 shared folder with my mac. I have schared the windows folder and have given full permission to evereyone.

The workgroup name, login and pasword are the same on the MAC and Windows 7 PS.

I have don a ping test and the result was ok, i've tested with another windows pc and i could connect to the shared folder, just with OSX mavericks it will not work.

What could be the problem?