I need to know exactly what is on the chain to the Dell, and to your touch. Modem to router? What is doing the wireless, what kind of modem, router etc, and do you have access to change settings on them. If you don't there's nothing we can do. I don't know why you can go the other way either, to the touch from the Dell, without knowing how both of you connect.
Can you do a network ping to the Dell like I asked you to try?
Then you either have the wrong IP or something is blocking traffic to the Dell.
Is it the IP in the image above? I can't ping it either. Don't post your IP in text format BTW, the picture was kind of okay. It's not a good idea to put it out in the open though.