Network accounts unavailable using wireless (Leopard client on AD)

Hi fellows, I'm doing some tests binding a MacBook (Late 2008), running Leopard 10.5.5 into AD, Server 2003 all up to date. The binding process was fine, but the problem is, if i try to connect over AirPort network, there's no network accounts available. I logged in as local administrator and Directory Utility can't contact AD server... Running [i]dsconfigad -show[/i], the bind appears to be ok, but [i]id[/i] any AD user shows "no such user" response. [i]dscl[/i] is also unable to browse the domain node, albeit is listed using [i]ls[/i] command. As soon as i connect the ethernet cable, everything works like a charm... The wireless network is working properly and if remove and re-add the AD server on Directory Utility, i'm able to authenticate against it without a problem, until i restart the MacBook. I also noted that bring the MacBook back from sleep, with requiring to authenticate option enable, cause authentication errors. I need to wait a few seconds before to type the password. Seems that wireless connection is not properly made right on wake. The logs does not say much. DirectorySevice, right after wake: 9/16/08 5:54:12 PM com.apple.KerberosAutoConfig[1030] Couldn't find KerberosClient config record 9/16/08 5:54:13 PM kernel AppleYukon2: 00000000,00000000 sk98osx_dnet - recovering from missed interrupt 9/16/08 5:54:16 PM com.apple.DirectoryServices[11] Enter machine password: 9/16/08 5:54:16 PM com.apple.DirectoryServices[11] Successfully registered hostname with DNS 9/16/08 5:54:18 PM com.apple.KerberosAutoConfig[1038] Kerberos configuration is up to date All messages: 9/16/08 12:48:25 PM kernel MAC AUTH succeeded 9/16/08 12:48:25 PM kernel AirPort: Link Up on en1 9/16/08 12:48:27 PM mDNSResponder[16] Note: Frequent transitions for interface en0 (FE80:0000:0000:0000:021B:63FF:FEB6:DA9D); network traffic reduction measures in effect 9/16/08 12:48:29 PM com.apple.KerberosAutoConfig[517] Couldn't find KerberosClient config record 9/16/08 12:48:33 PM fseventsd[36] callback_client: ERROR: d2f_callback_rpc() => (ipc/send) timed out (268435460) for pid 199 9/16/08 12:48:33 PM fseventsd[36] client: 0x1010800 : USER DROPPED EVENTS! 9/16/08 12:48:39 PM com.apple.DirectoryServices[11] Enter machine password: 9/16/08 12:48:39 PM com.apple.DirectoryServices[11] Successfully registered hostname with DNS 9/16/08 12:48:41 PM com.apple.KerberosAutoConfig[525] Kerberos configuration is up to date 9/16/08 12:48:43 PM fseventsd[36] callback_client: ERROR: d2f_callback_rpc() => (ipc/send) timed out (268435460) for pid 199 ... Just FYI, the MacBook clock is set to sync with AD. I know Kerberos could be very temperamental... Best regards, Rodrigo RJ, Brasil