[Zope] User acces to this()

[James van der Veen]

 Hi everybody,
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 hope someone can help me.
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 I have a mySQLuserfolder with a role Called Student.=20
 I now only want to show a piece of the page if the user is=20
 logged in as a student so I have this in my DTML Method:
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 <dtml-if "AUTHENTICATED_USER.hasRole(this(), ['Student'])">
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 But If I log in having a student role I get a unauthorized=20
 exception saying I=B4m now authorized to access "this".
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 Does anyone have a hint to help me on this?
 Do I need to set a security role or something?
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 Hope someone can help me on this one.
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 Greetz,
 James
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