Just be sure the first script is started. Insert a net send to your computer, like "Net Send %ComputerName% This is a Test !", (this is only for the test). If logon.bat starts kix will also start. But not in your Logon.bat.

You've typed \\sussex1\\NETLOGON, but it should be \\sussex1\NETLOGON. Just be shure that's correct. Otherwise the Kix32 won't be copied and also the script won't be found.

Hope this might help you out!