Stored Procedure Help For Join Query

[Riaaaa]

Hello members,

This is the SQL SERVER 2005 stored procedure.

It contains the data from the two diff tables.
(1)Customer :
Here clpid and cardid are composite primary keys with the identity field.It has storeid as foreign key.
The cardid is to be autogenerated everytime as the new customer is inserted.

I have to put the validations for the
* joindt = currentdate/todaydate
* dob is not greater than today date
* anniverdt is not less than equal to dob (in terms of year)

(2)Store :
Here storeid is the primary key.

 
 
ALTER PROCEDURE CustomerStoredProcedure
 
@cardid INT OUTPUT,
@clpid INT OUTPUT,
@storename varchar(20),
@firstname varchar(20),
@lastname varchar(20),
@joindt datetime,
@anniverdt datetime,
@dob datetime,
 
@frmErrorMessage AS VARCHAR(256) OUTPUT,
@RETURNVALUE AS INT OUTPUT,
@RETURNID AS INT OUTPUT
AS
 
DECLARE
 
  @storeid AS INT
 
BEGIN
SET NOCOUNT ON
 
 
--validation...
IF ( @firstname IS NULL OR @firstname = '' ) 
    BEGIN
        SET  @RETURNVALUE = -9
        SET  @frmErrorMessage = 'FName is empty'
        RETURN -9                        
    END 
IF ( @lastname IS NULL OR @lastname = '' ) 
    BEGIN
        SET  @RETURNVALUE = -9
        SET  @frmErrorMessage = 'LName is empty'
        RETURN -9                        
    END
 
if  @DOB<@AnniversaryDate
                begin
                    Select @frmErrorMessage ="AnniversaryDate cannot be greater then DOB"
                    return -9
                end 
            if  @DOB=@AnniversaryDate
                begin
                    Select @frmErrorMessage ="AnniversaryDate cannot be equal to DOB"
                    return -9
                end 
 
            if  @DOB>=getdate()
                begin
                    Select @frmErrorMessage ="DOB cannot be greater then Today's Date"
                    return -9
                end          
BEGIN            
IF EXISTS (select * from storemaster where storename = @storename)                                  
       select @storeid = storeid from storemaster where storename = @storename                                                                                     
 
 
IF EXISTS ( SELECT firstname,lastname,joindt,anniverdt,dob,
                 FROM customermaster WHERE clpid = @clpid and cardid=cardid) 
    BEGIN
        UPDATE customermaster
        SET firstname = @firstname,
            lastname = @lastname,
            storeid=@storeid,
            joindt=@joindt,    
            anniverdt=@anniverdt,
            dob=@dob,
 
    WHERE  clpid= @clpid and cardid=@cardid
 
        SET  @frmErrorMessage = 'Name and other information has been updated'
        SET @RETURNVALUE = 2
    END
END    
 
BEGIN
   IF EXISTS (select * from storemaster where storename = @storename)                                  
       select @storeid = storeid from storemaster where storename = @storename                                                                                     
 
 
  IF NOT EXISTS(Select firstname,lastname,address 
            from customermaster
            where firstname = @firstname,lastname=@lastname)
        BEGIN
           INSERT INTO customermaster (firstname,lastname,joindt,anniverdt,dob,introducedby)
               VALUES     (@firstname,@lastname,@joindt,@anniverdt,@dob,@introducedby)
           SELECT @clpid = SCOPE_IDENTITY()
           SELECT @cardid= SCOPE_IDENTITY()
        END
   ELSE
       BEGIN
          Print 'Name already exists'  
       END
 
        SET  @frmErrorMessage = ' Name and other information has been Inserted'
        SET @RETURNVALUE = 1
END
 
SET NOCOUNT OFF
END
 
 

Pls can anyone checkout my stored procedure as i have created for the first time for the join stored procedure.
It gives me the error but i can't rectify it.
It is too big but can anyone help then it's fine....
I have mentioned how i created my above procedure.
Can anyone also help me to check or put the validations for the date..

Thanxs in advance...waiting for solution

Hope to get a suitable reply