Problems with rqt in C++ [Solved] [closed]

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Hi mates!

I'm trying to create my own rqt package in c++ and I'm following the rqt tutorials, the rqt_image_view package and the rqt_rviz package to do it.

When i use "catkin_make" I don't have problems, but when i try "rosrun rqt_mypkg rqt_mypkg" or iniciate it with rqt interface i have this error:

[ERROR] [1428354457.786962509]: Failed to load nodelet [my_namespace/MyPlugin_0] of type [my_namespace/MyPlugin]: Could not find library corresponding to plugin my_namespace/MyPlugin. Make sure the plugin description XML file has the correct name of the library and that the library actually exists.
RosPluginlibPluginProvider::load_explicit_type(my_namespace/MyPlugin) failed creating instance
PluginManager._load_plugin() could not load plugin "my_namespace/MyPlugin": RosPluginlibPluginProvider.load() could not load plugin "my_namespace/MyPlugin"
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::lock_error> >'
pure virtual method called
terminate called recursively
Abortado (`core' generado)

Could you help me?