i have created webpart project for getting the list items of a corresponding
list of one of my site into a label.. using a query.. based on one of the field
in my list.the code wassx written using C# and sharepoint api
(SPList,SPQuery,SPSite classes etc) for SPS 2003 ,.net1.1 , VS 2003.
But when i dragged the imported webpart onto the webpart page i'm getting the
following error

"Cannot create XmlSerializers for this Web Part."

What can be the possible solution for this...

My another doubt is how to make a user control as a web part (any url's reg
this?) i tried with smart part (a 3rd party tool) to load the User control on to
the webpart page...but giving error saying

"Cannot load the UserControl <path/filename.ascx>

How to make the user control as a webpart for Sharepoint 2003 ,VS2003 .net 1.1?