Cant move folders to dual screen

Hi all,

Heres my problem. Had a bit of spare time on my hands over the weekend so decided to do a nice clean install of Mavericks to clear out some of the old junk/apps that have built up that i don't need. All seems ok except i now cannot drag any folders to my second monitor. apps move across fine but if i want to move a file it just springs back to the main screen. 99.9% this wasn't happening before.

Anyone else having this problem or is it just something simple that i have to change in my settings