Hi Sanya,
I deleted everything and installed the module again.
I added an instance of the module on a page ang got the error mentioned below.
After changing the language from Dutch to English and adding an instance of the module to a page again, everything went fine.
I did not get the error message again.
I tested the feedback module and it works fine now.
Thanks for your qiuck reply and the wonderfull feedback module.
With regards, Ton Hermes.
DotNetNuke.Services.Exceptions.ModuleLoadException: Exception of type 'System.Exception' was thrown. ---> System.Exception: Exception of type 'System.Exception' was thrown. at DotNetNuke.UI.ControlPanels.ControlPanelBase.AddNewModule(String title, Int32 desktopModuleId, String paneName, Int32 position, ViewPermissionType permissionType, String align) at DotNetNuke.UI.ControlPanels.IconBar.AddModule_Click(Object sender, EventArgs e) --- End of inner exception stack trace ---