Hello, I recently started using MIT App Inventor and I kindly ask for your help in understanding what the mistake in my syntax might be. I've checked it several times, and everything seems correct, but unfortunately, it's not working as I intended. It seems I may be making a small mistake. Thank you in advance for your response 
use the text property of the textboxes instead of the components itself...
name.Text
lastname.Text
Taifun
Thank you very much, you helped me