Yes, you will need to purge your cache before the changes will take effect. There is a button on th main page of the ACP that will allow you to do that. For future reference, support questions should be posted on phpBB.com support forums and not here
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Please do not post any "phpBB" specific topics here unless they do not fit into the category above.
Do not post bug reports, feature or support requests! No really... Do not post bug reports, feature or support requests! Doing so will make Bertie a very sad bear indeed.
