Error when accessing a database

Hello all,

when trying to access a database I get the following error:
AppUtils.cs(23,33): error CS0246: The type or namespace name 'BaseAppUtils' could not be found (are you missing a using directive or an assembly reference?)
It looks like a .Net Error when you didnt check the proper reference in the add project reference window...
This error has been posted before. I will wait for the answer of that post then.