Multi Statement table valued function

I have writtern the following function which is throwing up incorrect syntax . can some body pls show me what is wrong

GO
/****** Object:  UserDefinedFunction [dbo].[fnDeptDailyStkLedger]    Script Date: 10/06/2007 13:38:51 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
 CREATE FUNCTION [dbo].[fnConsolidatedDeptDailyStkLedger]
(
       @Dept varchar(2),      
         @Branch   varchar(2),
         @FDate       varchar(8),
         @Tdate    varchar(8)         
)

RETURNS @DeptwiseConsolidatedDailyStkLedger Table

      (
        @Trandate char(8),
         @DeptCode char(2),
        @DeptName char(2),       
        @OB_Qty   int,
        @OB_Value int,
        @Pur_Qty  int,
        @Pur_Value int,
        @RCT_Qty       int,
        @RCT_Value int,
        @ADJ(+)_Qty int,
        @ADJ(+)_Value int,
        @ISS_Qty int,
        @ISS_Value int,
        @ADJ(-)_Qty int,
        @ADJ(-)_Value int,
        @DIS_Qty int,
        @DIS_Value int,
        @PUR_RET_Qty int,
        @PUR_RET_Value int
   )
AS
Begin
   While @Fdate <= @Tdate    
     Insert @DeptwiseConsolidatedDailyStkLedger
     select @Fdate,S.*  from fnDeptDailyStkLedger(@Dept,@Branch,@Fdate) as S
     set @Fdate = @Fdate + 1      
End