if you are on solusvm control panel try to access your panel with elevated shell and install the panel inside a screen(google Linux screen for info), there is one more thing before trying to install the panel don't forget to update your centos, last but not least you said the ssh being disconnect the only reason i can think of it being updated or being forcefully disconnected from the network both are imaginable under normal circumstances but alas without any log and details its all smudgy.