Can't figure out why BWM-NG wont work :(

[Cexitime]

Hi all.

I'm pretty new to linux and been messing around with debian on a dedicated server,
I have setup some web servers and looking to monitor bandwidth in real time

I have installed BWM-NG and vnstat, vnstat works however bwm-ng just sits there displaying 0.00kbps


I've tried looking for a troubleshooting guide but there isnt any! I have no idea whats missing or broken for bwm-ng to work (I installed by running sudo apt-get install bwm-ng)
I have Debian 7.0 installed; its using an image created by kimsufi.

Thanks in advance for any help

[Cexitime]

Well seeing as no one else responded I shall post with an answer

OVH compile with GRSEC, which means regular users dont have access to /proc/net/dev folders.

just running the program as root will solve this.