Thread:Extension talk:CategoryTree/Problem with namespaces in category tree/reply (2)

The directions for use of this extension specifically state: "namespaces: a list of namespaces from which pages should be shown in the tree (since rev:36864, July 2008). The entries in the list must be namespace names, separated by spaces. The main namespaces can be represented by "-" or "0". This overrides the mode option." Also, I notice that you didn't wrap your arguments in quotes and you used commas. Try  -   -   -   -   instead.