ubun2

Recently want to access my remote ubuntu machine. So i enabled remote access on my ubuntu. Tried to connect to the remote ubuntu machine using Remote Desktop Viewer. It connected very slowly after quite some time. But i was not able to do anything. It was very very slow and it takes ages to do something on the remote machine. The terminal server client works great connecting to windows machines and it is blazing fast. Why remote desktop to ubuntu is very very slow? Is there a way to fix this?