need help on how to use...

i got physic's and flex's menu v2.1 (FOR PC) and when i give people "infectable menu to all" in zombie mode they dont no how to launch it i mean do you gotta type something in console or something like that..? They/I hosted the same menu gave me/us infectable menu but i couldnt figure out how to launch/activate it.. and i tryed a few times after he give's it to us it says leave after 10 sec's but nothing after that saying how to launch... any info would be much appreciated..

It's an unbound key...... You have to set a button for something, idk which one.

unbound key.. somone told me it's tab and left mouse button but didnt work anyways man thanks for info..