Once you've opened the app on your phone and you're on
http://web.airdroid.com/ on your laptop, do you see all the icons called "photos" "camera" "call logs" etc??
If you want to transfer a photo, click on "photos". This will open a separate folder, click on "100ANDRO" (at least this is what it's called on my Xperia 10 III). If you're connected, all your photos should be visible. They all have a little white box in the top left hand corner that you can click on - select all the photos that you wish to download to your laptop and then press "download" in the top right hand corner of the folder.
If you can't see your photos, then something else is amiss .... which I'll try and help with if that's the case :)