Black and Pink Square(No not like that)

I have a little square in the bottom righthand side of my screen that is black and pink, right about where the place where if someone uses their mic, their name pops up. Please help.

You’re missing the texture for the vgui that pops up when someone uses a mic. It’s happened before with an addon I installed.

There might be a broken server addon where it replacing the original textures with another type of texture or the addon hasn’t installed the files correctly.

http://filesmelt.com/dl/squarebox.jpg

Noone was talking when I took this screenshot.
Help?

[editline]10:27PM[/editline]

also on DarkRP my friends f4 menu or options menu is just like completely gray, help please?