Make sure you send any Easy Anti Cheat error messages over to support. They should be able to help figure out what the cause is. Reach out to them through http://support.ubi.com.
where are these error messages located? it's bad enough i've spent the last 2 days in an uninstall/reinstall HELL trying to get into a 4v4, but when i finally DO i get this easy anti-cheat error....