Forum Plugin error
 

I have a error in my member profile.
I know that must be one of the plugin's which I have installed.
When I disable the plugin/hook system in the options than the forum works good.
So I know it is a plugin.
So I have enable the plugin /hook system and in the plugin manager alll plugin's set to disable.
The strange is that the error still is there but I wonder how this is posible.
Is there a difference between disable the plugin in the options and disable it in the plugin manager?
Any idea how to search for the problem?