Working with remote dekstop?

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http://askubuntu.com – I am running a Ubuntu 11.10 virtual machine under KVM hypervisor, bridged and connected to the local network. I installed VNCServer in the virtual machine and tried remote desktop, What happens is when i remotely connect to the virtual machine (through VNC i used to add the :1 tag), the desktop is greyed out and i can access only the terminal (Pressing Ctrl+Alt+T in desktop). From terminal i can open firefox and other GUI installed software. The thing is I cannot see my desktop. At the terminal whenever i press the letter 'd' it is going to desktop. And, When i tried to access the remote mac (HowTos)