Store Procedure

Hi guys
i would really appreciate your help here. what am i doing wrong with this stored procedure
 
ALTER PROCEDURE usp_CreateNewCustomer
(
 @LName as varchar(50),
 @FName as varchar(50),
 @Dept as varchar(50)=NULL,
 @PhoneType as varchar(50)=NULL,
 @Complete as Bit=NULL,
 @CustomerID as Int OUTPUT,
 @FaxModel as varchar(50)=NULL,
 @FaxNumber as varchar(50)=NULL,
 )

AS

INSERT INTO [CustomerInfo] ([LName], [FName], [Dept], [PhoneType], [Complete])
VALUES (@LName, @FName, @Dept, @PhoneType, @Complete)

SELECT SCOPE_IDENTITY()

INSERT INTO Extras (CustomerID, FaxModel, FaxNumber)
VALUES (@CustomerID, @FaxModel, @FaxNumber)

RETURN

 
It keeps on complaning "'usp_CreateNewCustomer' expects parameter '@CustomerID', which was not supplied."
thanks