Serialization, Reflection and Inheritance question

[aegis]

Hi All,

Im developing a web service in C# that Im running into a few problems
with. Essentially I am trying to move a custom class (which contains an
array of objects) over the WS to the client. This works fine if the
objects in question have no parent (ie they do not directly inherit
from my classes), however the moment I create a say "BaseObject" to
inherit them from, I get Reflection errors such as;

An unhandled exception of type 'System.InvalidOperationException'
occurred in system.web.services.dll

Additional information: Method Commission.GetEmployees can not be
reflected.

What I have as an example is an Employee Class that has a parent,
EmployeeSuper. Both are marked as Serializable, and appear correctly (I
believe) in the proxy generated in VS.net.

So to my question, does C# allow reflection on derived classes? And has
anyone ever built WS passing custom collections of inherited classes
(and can they give me any hints as to what Im doing wrong??).

Regards,
Rob