I do not know if this is the right place to post this @_@
What you need:
Lots of account
Register accounts in the private server you want to vote abuse.
After you got it,double click on it.
double click on this to install
Advice: Do not include the Hotspot Shield Community Toolbar
Tick both the 'Launch Hotspot Shield' and 'Create Desktop Icon'.
Click 'Finish' when it's done.
After you clicked finish,a tab will be opened up.
It will automatically changes your IP Address.
Log on your account to vote.
After you had voted,the server have recognized your IP address so you can't vote with other account anymore for 12 or 24 hours.
Now log out.
Right click on Hotspot shield and disconnect it (It will became red when it is off as shown as the image below)
Now, right click on it and click on 'Connect/On' again.
It will turn green again when it successfully connected.
After it successfully connected,
log in your other account.
You will found that you can vote again.