In oder to connect to your seedbox for VNC which also means Virtual Network computing , you need a VN VNC viewer you can download the vierwer for both 32 bit and 64 bit from the links below.
For 32 Bit
For 64 Bit
Once downloaded and installed watch the below video :
So now once you run your Tight VNC and get your dialogue box then put in it the VNC address you have recieved in your mail , and then it will automatically ask for a password put that in once done you can autometically see your remote desktop.
If there is a too much lag in the connection, choose slower speeds to stream the remote desktop