I had a company upgrade me to 6.15 and that was a big mistake as they had to put me back to 6.14 as it caused a lot off error. Out of that I've lost my license's to Ray and that includes not being able to use video and the IM messenger throws up user authentication failed. So anymore upgrades I'll only commit to do if it works 100% and is'nt going to cause the headaches I've got at moment!!!