Cannot Create A Custom Task

I've gone through all the steps, and when I finally drag the custom task I've made into the control flow, I get the error

"Failed to create the task. ... Cannot create a task with the name "SSISExportToExcel.ExcelExport.ExcelExport, SSISExcelExport, ... Verify the name is correct"

Here's the beginning of my class... any help would be appreciated...


Namespace ExcelExport
<DtsTask(DisplayName:="Excel Export Task", _
Description:="Exports a SQL query results to an Excel Document")> _
Public Class ExcelExport
Inherits Task
....