problem with the code

----------------------------------

CREATE TABLE [tblTest] (

 [YEARVAL] [smallint] NOT NULL CONSTRAINT [DF_tblXXX_YEARVAL] DEFAULT (datepart(year,getdate())),

 [AUTONUM] [int] IDENTITY (1, 1) NOT NULL ,

 [ValX] [char] (1) NOT NULL ,

 CONSTRAINT [PK_tblTest] PRIMARY KEY  CLUSTERED

 (

  [YEARVAL],

  [AUTONUM]

   ON [PRIMARY]

) ON [PRIMARY]

GO

----------------------------------

the error

Server: Msg 156, Level 15, State 1, Line 9

Incorrect syntax near the keyword 'ON'.