i use this sql and C# code i want to display error message in lable in

i use this sql and C# code i want to display error message in lable in i get parameter count error what wrong in this query or code any body please help

Alter Procedure [dbo].[Proc_ConsumermasterInsert]
(@DCM_DeptName nvarchar(100),
@DCM_Address varchar(200),
@DCM_MobileNumber varchar(20),
@DCM_CEOName varchar(50),
@DCM_EmailID varchar(50),
@DCM_DeptDescription varchar(200),
@DCM_AddedBy int,
@DCM_AddedIPAddress varchar(50),
@DCM_Remarks varchar(50),
@DCM_Abbrivation char(5),
@DCM_CategoryAgencyId int,
@DCM_ContactPersonName varchar(100),
@DCM_ContactPersonMobileNumber varchar(15),
@DCM_ContactPersonEmailID varchar(50),
@DCM_ContactPersonLandLineNumber varchar(20),
@ERROR varchar(500) =null
--@ERROR varchar(500) out
)
as begin
DECLARE @consumerid nvarchar(20)
DECLARE @getuid nvarchar(20)
begin try
SET NOCOUNT ON
begin transaction
IF NOT EXISTS (SELECT DCM_ConsumerID FROM [DataConsumerMaster] WHERE DCM_DeptName =@DCM_DeptName)
BEGIN
insert into [dbo].[DataConsumerMaster] (DCM_DeptName, DCM_Address, DCM_MobileNumber, DCM_CEOName, DCM_EmailID, DCM_DeptDescription,
DCM_DataConsumer, DCM_AddedOn, DCM_AddedBy, DCM_AddedIPAddress, DCM_Status,DCM_Remarks,DCM_EntryMode, DCM_Abbrivation,DCM_CategoryAgencyId,
DCM_ContactPersonName,DCM_ContactPersonMobileNumber,DCM_ContactPersonEmailID,DCM_ContactPersonLandLineNumber)
values(@DCM_DeptName, @DCM_Address, @DCM_MobileNumber, @DCM_CEOName, @DCM_EmailID, @DCM_DeptDescription,
'A', getdate(), @DCM_AddedBy, @DCM_AddedIPAddress, 'A',@DCM_Remarks,'D',@DCM_Abbrivation,@DCM_CategoryAgencyId,
@DCM_ContactPersonName,@DCM_ContactPersonMobileNumber,@DCM_ContactPersonEmailID,@DCM_ContactPersonLandLineNumber)
Select @consumerid = SCOPE_IDENTITY();
set @getuid = (Select DCM_ConsumerID FROM DataConsumerMaster WHERE DCM_ID = @consumerid)
--Select @getuid= (Select UserName from Logins where Login_ID=@consumerid)
--return @consumerid
IF NOT EXISTS (Select * From Logins where Officer_Name=@DCM_CEOName)
BEGIN
Insert into Logins(Password,UserName,Officer_Name,Officer_Mobile,Email_ID,Type_Of_User,Status,Date_of_Creation,created_by,Date_of_Modification,Roles)
Values('ov2FeiYRwvE=',Convert(nvarchar(50), @getuid) ,@DCM_CEOName,@DCM_MobileNumber,@DCM_EmailID,4,'Approved','',@DCM_AddedBy,'','C')
END
commit transaction
set @ERROR =@getuid
--Print @consumerid
return @ERROR
End
Rollback transaction
set @ERROR ='User Id Allredy Genarated For this Department'
return @ERROR
end try
begin catch
if(@@trancount>0)
begin
set @ERROR = 'Error !' /*'Details Not Saved. Sorry For The Inconvinience.'*/
return @ERROR
end
end catch
END

DataSet dsid = new DataSet();
SqlParameter[] arParamsOwners = null;
arParamsOwners = new SqlParameter[16];
arParamsOwners[0] = new SqlParameter("@DCM_DeptName", System.Data.SqlDbType.VarChar, 100);
arParamsOwners[0].Value = getObjMaster.ApplicationName;
arParamsOwners[1] = new SqlParameter("@DCM_Address", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[1].Value = getObjMaster.Address;
arParamsOwners[2] = new SqlParameter("@DCM_MobileNumber", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[2].Value = getObjMaster.MobileNumber;
arParamsOwners[3] = new SqlParameter("@DCM_CEOName", System.Data.SqlDbType.NVarChar, 500);
arParamsOwners[3].Value = getObjMaster.CeoName;
arParamsOwners[4] = new SqlParameter("@DCM_EmailID", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[4].Value = getObjMaster.EmailID;
arParamsOwners[5] = new SqlParameter("@DCM_DeptDescription", System.Data.SqlDbType.VarChar, 100);
arParamsOwners[5].Value = getObjMaster.ComapnyDescription;
arParamsOwners[6] = new SqlParameter("@DCM_AddedBy", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[6].Value = getObjMaster.approvedby;
arParamsOwners[7] = new SqlParameter("@DCM_AddedIPAddress", System.Data.SqlDbType.NVarChar, 500);
arParamsOwners[7].Value = getObjMaster.clientip;
arParamsOwners[8] = new SqlParameter("@DCM_Remarks", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[8].Value = getObjMaster.Remarks;
arParamsOwners[9] = new SqlParameter("@DCM_Abbrivation", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[9].Value = getObjMaster.Abbrivation;
arParamsOwners[10] = new SqlParameter("@DCM_CategoryAgencyId", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[10].Value = getObjMaster.Agencycategoryid;
arParamsOwners[11] = new SqlParameter("@DCM_ContactPersonName", System.Data.SqlDbType.NVarChar, 500);
arParamsOwners[11].Value = getObjMaster.PersonName;
arParamsOwners[12] = new SqlParameter("@DCM_ContactPersonMobileNumber", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[12].Value = getObjMaster.PersonMobileno;
arParamsOwners[13] = new SqlParameter("@DCM_ContactPersonEmailID", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[13].Value = getObjMaster.PersonEmailid;
arParamsOwners[14] = new SqlParameter("@DCM_ContactPersonLandLineNumber", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[14].Value = getObjMaster.Personlandline;
arParamsOwners[15] = new SqlParameter("@ERROR", System.Data.SqlDbType.NVarChar, 100);
arParamsOwners[15].Direction = ParameterDirection.Output;
// string message = arParamsOwners["@ERROR"].Value.ToString();
int Consumer=SqlHelper.ExecuteNonQuery(myConnectionString, "Proc_ConsumermasterInsert", arParamsOwners);
return Consumer;