Creating A UDT Type With Create Assembly

I created a UDT Type (using MS Server Express Edition  and Visual Basic 2005 express) but I get some errors:





Msg 6556, Level 16, State 1, Line 6

CREATE TYPE failed because it could not find type 'UDTProj' in assembly 'UDTProj'.

Msg 6597, Level 16, State 1, Line 6

CREATE TYPE failed.



That is my code:



Public Structure UDT_interval

Private adresse As String

Private beginn As Date

Private ende As Date



End Structure



************in Transact-SQL

//register the UDTProj assembly

USE TestData;

CREATE ASSEMBLY UDTProj

FROM 'C:MS Visual StudioMyOutputinReleaseUDTProj.dll '

WITH PERMISSION_SET = SAFE;



// create the UDTProj type

CREATE TYPE dbo.UDTProj

EXTERNAL NAME UDTProj.[UDTProj];



or



CREATE TYPE dbo.UDT_interval

EXTERNAL NAME UDTProj.[UDT_interval];



>Msg 6556, Level 16, State 1, Line 6

CREATE TYPE failed because it could not find type 'UDT_interval' in assembly 'UDTProj'.

Msg 6597, Level 16, State 1, Line 6

CREATE TYPE failed.



can anyone help me?

Regards.

D.M