How to send pictures wireless from iphone to computer (photo stream)?

I have a iphone 4, and i want to know how to send my pictures from my phone to my laptop, i have i cloud set up, itunes etc. So when i take a pic on my phone, it should automatically be on my laptop in the photo stream folder. I just can't seem to figure out what i'm doing wrong. There's some pics on my computer which were sent from my Iphone in the photo stream folder, but anything recent its not sending over. Its on a Wi-Fi connection. But its driving me mad.lol.

Added (1). Hi. My icloud is enabled with a tick on photos.

Sign up in icloud and enable photo stream.

SETTINGS>ICLOUD>PHOTO STREAM> ON

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