after payment??? i use real vnc free edition??

oh you meant when they ask you to enther the vnc password, when typing nothing appears? just continue typing and hit enter, they will ask you to type once again to verify and the password will not show up too, its like when you type password and *** appears but SSH the password doesnt appear.

i make it but comes in the vnc viewer "unable to connect to host" ???

did you start vnc on the server?
issue the command
in putty