local:Converter not found error . Please help .

Error 1 The type 'local:Converter' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.

May i know how to solve this error thanks

The following link below is where the xaml codes are

http://social.msdn.microsoft.com/Forums/vstudio/en-US/0890a12f-7856-45af-a086-11954719793b/listview-column-and-per-row-color-question-