Thread:Extension talk:ParserFunctions/Unable to call ExtParserFunctions::ifObj() in includes/parser/Parser.php

Im' using Mediawiki 1.16.5.

I followed instruction to install PArserFunctions but whan I load a page using it I'v got the error message :

Warning: call_user_func_array [function.call-user-func-array]: Unable to call ExtParserFunctions::ifObj in /mnt/102/sdb/d/8/patrick.gelin/wiki/includes/parser/Parser.php on line 2920

I need to say I'm into free.fr server, so I know it's not the best way to run mediawiki. I've got similar problem with other extensions so I'm saying myself it may be a global installation problem of my wiki. Because I installed it not at the root of the web serveur but into a children directory. So I'm using the url http://patrick.gelin.free.fr/wiki and not http://patrick.gelin.free.fr.

When I look into special:version it's all fun, the component PerserFunctions seems to be installed withour error.

Thank you for your help !

Patrick