insert object into sql sever 2000

[anurakin]

procedure TFCustomer.Do_Insert_Img(pCust_ID:String);
const
sqlIns_Img = 'INSERT INTO tbCust_Img(Cust_ID,Cust_Img) ' +
'VALUESCust_ID,:Cust_Img)';
var
mStream : TMemoryStream;
begin

mStream := TMemoryStream.Create;
try
mStream.Clear;
mStream.LoadFromFile(OpenDialog1.FileName);
mStream.Position := 0;

with ClientDataSet1 do begin
Close;
CommandText := sqlIns_Img;
Params.ParamByName('Cust_ID').AsString := pCust_ID;
Params.ParamByName('Cust_Img').LoadFromStream(mStream,ftBlob);
Execute;
end;
finally
mStream.Free;
end;
end;

It's Error 'Operand type clash: text is incompatible with image'
Please Help Me
Thank You.