Cannot get XArp to work.

XArp is a front end for arp, to check against wifi / mac phishing (not sure these are the right terms, but that's how I explain it to myself).

I was able to install it, but gives me funky message:
"xarp: relocation error: xarp: symbol _ZN21wxMemoryFSHandlerBase19AddFileWithMimeTypeERK 8wxStringPKvjS2_, version WXU_2.8 not defined in file with link time reference"

And when I try to start it from the launch bar, it tells me it is already running under root. How can I get rid of that error message and how can I see the application running?

Any idea how to fix this? How can I see graphic applications that run as root in ubuntu? Sudo something?