File Not Found exception (though file exists)

See more:

ASP.NET

sir i am using webservice to save the images in database

webservice code

public void save_Image(int id, byte []ar)
    {
        SqlCommand cmd = new SqlCommand();
        cmd.CommandText="insert into tbimage values(@id,@nam)";
        cmd.Connection=con;
        cmd.Parameters.Add("@id",SqlDbType.Int).Value=id;
        cmd.Parameters.Add("@nam",SqlDbType.Image).Value=ar;
        cmd.ExecuteNonQuery();
        cmd.Dispose();

    }

Webform which consumes this webservice

protected void Button1_Click(object sender, EventArgs e)
    {
        abc.WebService obj = new abc.WebService();
        int ln = FileUpload1.PostedFile.ContentLength;
        byte []arr=new byte[ln];
        FileStream fs = new FileStream(FileUpload1.PostedFile.FileName,FileMode.Open,FileAccess.Read);
        fs.Read(arr, 0, ln - 1);
        fs.Close();
        obj.save_rec(Convert.ToInt32(TextBox1.Text),arr);
        TextBox1.Text = string.Empty;
        TextBox1.Focus();


    }

please help