Function un.RemoveFromPath is not work?

Hi all,
I am trying to set environment path variable by NSIS.I also search on Wiki follow this link . Now I can set environment well but I want to delete what I set in path variable.I try with this un.RemoveFromPath or un.RemoveFromEnvVar. Variable path is not deleted when I finished my installer.
I try with example but I can not delete it.
If you used to see this problem please tell me why?
I may be work wrong some places?
I aslo create file AddToPath.nsh and add it in my script. But variable path is not deleted.
Please help me!
Thank in advance,

Hi sunlight112!

Can you see the value in the system properties dialog? Or is it gone?

Cheers

Bruno

Thank bholliger,
After I try with function un.RemoveFromPath. I have restart my computer but environment path variable is still in it.
Before I try with my function, the path is

%SYSTEMROOT%\SYSTEM32;%SYSTEMROOT%;%SYSTEMROOT%\SYSTEM32\WBEM;C:\WINDOWS;C:\WINDOWS\SYSTEM32\WBEM;C:\WINDOWS\SYSTEM32;C:\Program Files\Java\jre1.5.0_08\bin;C:\MySQL\MySQL  Server 5.0\bin

I used function un.RemoveFromPath to make path variable like this

%SYSTEMROOT%\SYSTEM32;%SYSTEMROOT%;%SYSTEMROOT%\SYSTEM32\WBEM;C:\WINDOWS;C:\WINDOWS\SYSTEM32\WBEM;C:\WINDOWS\SYSTEM32

It still displays in Path variable although I have used it already.
Does it code in function un.Removefrompath has problem?
If you know, please tell me!
Thank in advance,