Windows 7 64bit Windows2003 Domain and Linux based

[thisis1407]

I have a combined mode network of Windows2003 Domain Controller and Linux DNS.
Will it be better for me to carry on utilizing Linux DNS (Bind nine.x) with
Windows2003 AD or should certainly I upgrade to Windows 2003/2000 based DNS? I
generally gets logon failure message stating "Domain xxx is not available".
Also,Windows 7 Professional Key, we are experiencing lot of problems due to static IP addressing in 200+
user environment,Microsoft Office Pro 2010! These Linux people have not configured BIND for dynamic
updates and hence,Windows 7 64bit, name resolution is also not working correctly (I've no
idea of BIND,Microsoft Office 2010 Professional Plus, how it works).
Any help would be appreciated.