I've had the same problem. Tried these fixes - some of which worked for some - with different result:
1 this AWESOME guide - didn't work
2 Pull the battery while ON - didn't work
3 Put LIGHT presuure on the camera with battery off - didn't work
4 change picture storage to SD card - didn't work
5 options-advanced...-host-register - didn't work
6 pulled SD card - worked for a minute or so (I tought card was faulty. Worth a try)
7 installed original version of device manager that came with the phone (my case 4.2.0.14) and reinstalled latest device software with it ( at time 4.5.0.55) finally worked!!!

Seems the the newer version of DM messed something up for me. But the latest version of device software is ok as long as I used the original (for me) version of Dm to install it. It took me a month but finally.