sstatus command appears not to work

I have an issue that seems opposite to a previous post I found in this forum.

The writeProtect setting in the status command is not having an effect

I have used the following in my CIW:
sstatus(writeProtect t)
t

The command appears to have been accepted.

Then I load some SKILL:
xxx= load("./myskill")

function abc redefined
function def redefined

Then repeat the command:

xxx= load("./myskill")

function abc redefined
function def redefined

From the documentation, I expected to get an error:

*Error* def: function name is write protected
and cannot be redefined - abc

Can anyone see what I have done wrong?

Thanks

Colin