Question: Initialization file not being executed?

I am just starting with Maple 18 on Windows 8.1. I did not like the default color palette for 2D graphs and tried another one. So I edited my maple.ini file, which was in 

C:\Program Files\Maple 18\bin.X86_64_WINDOWS
 
adding the line
 
with(plots); setcolors("Spring");
 
Then I restarted Maple but graph colors continued as they were.
 
I also tried to add the line
ZZZ:=9999:
 
to maple.ini but after restarting the variable ZZZ was not recognized.
 
I must be missing something. Can someone help?
 
Thanks.
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