Error Converting Data Type Varchar To Numeric.

hello everyone... i have some problem to with my trigger.. after execute the trigger.. i got this errro "Msg 8114, Level 16, State 5, Procedure trg_InsertPVReadingMeter, Line 14
Error converting data type varchar to numeric."


below is my command sql table PVReadingMeter

quote:USE [PVMC Database]
GO
/****** Object: Table [dbo].[PVReadingMeter] Script Date: 03/25/2008 01:18:06 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[PVReadingMeter](
[PV_reading_id] [uniqueidentifier] NOT NULL CONSTRAINT [DF_PVReadingMeter_PV_reading_id] DEFAULT (newid()),
[PV_reading_date_time] [datetime] NOT NULL,
[PV_reading_meter] [decimal](8, 2) NOT NULL,
[PV_normalized_monthly_yield] [float] NOT NULL,
[PV_normalized_monthly_energy_yield] [float] NOT NULL,
[PV_application_id] [uniqueidentifier] NOT NULL CONSTRAINT [DF_PVReadingMeter_PV_application_id] DEFAULT (newid()),
CONSTRAINT [PK_PVReadingMeter] PRIMARY KEY CLUSTERED
(
[PV_reading_id] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]

GO
USE [PVMC Database]
GO
ALTER TABLE [dbo].[PVReadingMeter] WITH CHECK ADD CONSTRAINT [FK_PVReadingMeter_Photovoltaic] FOREIGN KEY([PV_application_id])
REFERENCES [dbo].[Photovoltaic] ([PV_application_id])
ON UPDATE CASCADE
ON DELETE CASCADE

below is my trigger

quote:set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go

CREATE Trigger [trg_InsertPVReadingMeter]
on [dbo].[PVReadingMeter]
for insert
as
begin

DECLARE @PVReadingMeter VARCHAR(100)
DECLARE @PVNormalizedMonthlyYield VARCHAR(100)


SELECT @PVReadingMeter = (SELECT PV_reading_meter + '' FROM Inserted)
SELECT @PVNormalizedMonthlyYield = (SELECT PV_normalized_monthly_yield + '' FROM Inserted)

-- Print the name of the new author

PRINT 'The new photovoltaic reading meter"' + @PVReadingMeter +'" is added.'
PRINT 'The photovoltaic normalized monthly yield is "' + @PVNormalizedMonthlyYield +'"'

end;




now, this is command to insert the values into PVReadingMeter table using trigger that has been created....

quote:insert into PVReadingMeter (PV_reading_date_time, PV_reading_meter, PV_normalized_monthly_yield,
PV_normalized_monthly_energy_yield, PV_application_id)
values (getDate(), 1.1, 4234.33, 43.44, '3D23C4FE-F6FC-475E-8CEC-23FE4E738EB9')


so, i got this error... Msg 8114, Level 16, State 5, Procedure trg_InsertPVReadingMeter, Line 14
Error converting data type varchar to numeric.

what should i do???