Cubase AI 6 upgrade to Cubase Element 7

Recently, I upgraded from Cubase AI 6 to Cubase Element 7 and after waiting until it became compatible with my iMac Yosemite OS 10.10.1, I was able to use the installer tool and update it to get it to work.However, I’m experience difficults when connecting my Motif XF 8 as a VST instrument. I keep getting a loud tone that seems like an echo. I’m requesting a technician to remote into my system to check my connection and give me suggestions on how to correct the issue. Or should I uninstall Cubase Element 7 and reinstall it.