I Set Up Network Sharing Via Samba To Share Files Between Ubuntu 12.04 And Windows 7. When I First Set It Up It Was Working Perfectly And I Was Able To Share Files. Now My Computer Running Windows 7 Can See My Computer Running Ubuntu; But I Can't See My Computer Running Windows 7 In The Network Folder Anymore. How Can I Solve This Problem?
Thank You For Your Patience.

OS - Windows 7, Ubuntu 12.04

Network - Wireless Home Network (No Internet Access)

Server Configuration - Samba