error in the enumeration

Seriously I don't know sometimes what will happen to MATLAB.

%% This is my enum class file
classdef Connection
    enumeration
        Series, Parallel
    end
end

but

>>C2 = Connection.Parallel

The class Connection has no property or method named 'Parallel'.

it is showing error.

>> C1 = Connection.Series

C1 =

Series

It's working for series, not for parallel.

It's working for this class file properly for both Metal and Air, why not for Parallel?

classdef Materials
    enumeration 
        Metal, Air
    end
end

Kindly get me out of this shit.

Thanks in advance.

[Walter Roberson]

It works for me. Perhaps you have an old version of the file stuck.

 clear Connection
 

and try again.