Hello and thanks for your question.
What is the model of your kindle?
for eg: Kindle fire, paperwhite etc.
What error message you get when entering the network password?
Is your computer connected wirelessly to your router?
In that case I need to remote in your computer and find out the wireless password ***** you. Then you will enter this password ***** your kindle to get it connected to your wireless router.
What is the operating system of your computer?
for eg: windows 7, windows 8 etc.
Are you talking with me from the same computer?
Please let me know I will send you the remote link.
I was waiting for your reply.
Please click this link: http://www.justanswer.com/remotedesktop/join.aspx?Session=e1cccc41-dd02-4207-9737-3d564f00462f
Then Click "I Agree"Then download and run the Elsinore Screen Connect.