Just tried the whole link out on my machine and it worked fine. Check these things:
1. Make sure you are doing this step (required in MR3 and above) [HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Symantec Endpoint Protection\SMC]
"smc_debuglog_on"=dword:00000001
2. When you are setting your path don't use "C:\Symantec", like the link says you must do "C:\Symantec\Sylink.log" or just "C:\Sylink.log" if that is where you want it. I think you were forgetting the actually place the Sylink.log part