Hello
IMO this is problematic line:
\\cluster_01\util$\kix32.exe mapdrives.kix
1. kix32 must be on "netlogon" share on every logonserver in domain (I use replication)!
2. try use batch. Add line:
call %0\..\mapdrives.bat
Put this to this batch:
%0\..\kix32.exe mapdrives.kix
Maybe this help