Why doesnt my ipod automatically connect to wifi at my own house? I have to log in every single time I come home. :/

I have an HP desktop thats hooked up to a Verizon modem, and a linksys wiki router, and ever since i came home from colorado a couple weeks ago, it wont remember my wifi router i guess and i have to log in every time i come home instead of it being automatic. I no its not the ipod, but any ideas on what to do? Im not very tech savvy so please make it easy haha 🙂

Thank you!!