I cant move manualy the axis.The yellow arrows don't work.When i press it the only thing that changes is "feed".How can i fix that

Double check your port pin settings. If you aren't sure what they should be go to this page http://www.stepperworld.com/pgSoftware.htm and scroll down the page for the settings. Make sure your Y-enable is set to true with all others set to false. If it worked before and doesn't work now reboot the computer. If a reboot doesn't work re-install Kcam and setup everything from scratch.

If it never worked the port settings is very important. Hope this helps.