I don't know about how it actually works but call is made for calling batch files.
so, first start by correcting your logon.bat:
Logon.bat
*************************************************
ECHO ON
set path=c:\winnt\system32;\\bstl_svr1\netlogon;
IF "%OS%" == "Windows_NT" goto NT_OS
z:\kix32.exe Logon9x.bat
EXIT

:NT_OS
kix32.exe LogonNT.kix
EXIT
*************************************************
_________________________
!

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