WEP is an older, less secure, encryption standard that was replaced with WPA - and then WPA2.
Your network is called WPA-Personal, so you must be using WPA.
You need to enter the correct key as prompted - this should be visible in the wifi router "wireless security" section (or whatever it is called on your router).
It is a hexadecimal number between 8 and 63 characters in length - e.g. af16af3c75f3edc8ad0ab27c58. The more characters the stronger the key! And no, that isn't mine!
Note that some routers allow you to type in a word or phrase that the router then uses to generate a hex key. The attached devices must use the hex key, not the original phrase.
Note also that for the Security Mode (WPA Personal), the WPA Algorithms (TKIP / AES) and WPA Shared Key must also match on the router and all connected devices.
SD