VPN site-to-site problem "DNS Name resolve"

[mamama]

Hello Everyone, help me thanks ... I have two office with (two FGT 5.4) connected VPN point-to-point, it works..!! 1)site A, FGT60D + (Microsoft Domain whit AD+DNS) Example: -FGT 192.168.1.1 -DNS server 192.168.1.3 -Name zone is: site_a.local -PC_A 192.168.1.10 = pc.site_a.local 2)site B, FGT60D + (Microsoft Domain whit AD+DNS) Example Name zone is: site_b.local -FGT 10.0.0.1 -DNS server 10.0.0.3 -Name zone is: site_b.local -PC_B 10.0.0.10 = pc_b.site_b.local Now, if I try from both PCs (pc_A and pc_B) the command PING IP it works..!! But, if I try the PING NAME command pc_a.site_a.local or pc_b.site_b.local does not work :-( I tried various configurations, but nothing ( :( ) please who send me step by step configuration DNS and FGT..? Thank you very much MArk MAttong