Error 124 The type name 'EticketsDataTable' does not exist in the type 'EticketsDAL.O

Hi,
I add dataset designer to my web aplication, then I start adding tableadapters

But when I want to instantiate a datatable which is exactly a table in my DB I get this error when compiling:

Error 124 The type name 'EticketsDataTable' does not exist in the type 'EticketsDAL.Orleans' C:\Dev\......\WebSite3\App_Code\EticketBLL.cs

Etickets is a table in the SQL database
Orleans is the name of my dataset
and 'EticketsDAL is the namespace of my application

Thanks for your help.