how to block websites with blocksite?!?!

[FXTrend240]

i typed int the names of the wesbites but it didn't work. i used 'www.xabc123.com' for example. but it wont work?

 

[FXTrend240]

in fact; is tehre any way to put on a time block? as in , after 2 months it will unlock a website?