Default Screencast Android Problem

hello guys !

could anyone please help me, i got my google nexus 4 screen cracked, i only realize it after i took it out from my pocket.
right now my touch screen couldn't work anymore.

so i decided to download screencast to at least get it to work temporary,
but the thing is screencast is working but not the mouse and keyboard. i just couldn't get it control with my mouse,
i've tried to follow on "" intrustion method but no luck tho...

anyone knows how to get the mouse and keyboard works ?

Thank you !