Attribute '<Attribute>' cannot be applied to an assembly

Hi,

I am rewriting a COM+ application originally written in VB 6.0 to run
in .NET 3.5. When I attempt to set
attribute values for some attributes I am getting the following -- for
example if I try to set TransactionAttribute
I get the following error -- Attribute 'TransactionAttribute' cannot
be applied to an assembly.

What in the hell does this mean? I can't find any documentation beyond
the following blurb in msdn --
You attempted to apply an attribute to an assembly whose
AttributeUsageAttribute does not specify AttributeTargets.Assembly.
When the attribute was declared, it was not defined to be applicable
to an assembly.

Here's the code segment that is causing my grief ---

<Assembly: ApplicationActivation(ActivationOption.Server)> _
<Assembly: ApplicationAccessControl(False,
AccessChecksLevel:=AccessChecksLevelOption.ApplicationComponent)>
<Assembly: Transaction(TransactionOption.Required)>
Public Class SomeClass
Inherits ServicedComponent

Public ServerAddress As String
Public DatabaseName As String
Public UserName As String


Please help!

Thanks,