I create a sample DTS Custom task that does nothing more than display a
Message Box just to see if I can get it to work. I am writing in C#.

I followed steps in MS article 326909

My problem is that when I open the DTS package, I can see the icon for
my task in the toolbox of the DTS designer. But when I drag it into
the package, I get an error message box with the text belo:

Error Source: Microsoft Data Transformation Services (DTS) Package

Error Description: Task 'DTSTask_DTS.SampleDTSTask_1' was not found.

Can anyone shed any light on this issue?

As per the MS article, my assembly has a strong name, has been
registered using REGASM and has been installed into the GAC.

Can anyone shed some light on this or point me to a tutorial for
creating a custom DTS task using C# that goes from start to finish?

Thanks,

Chris