Missing /var/run/asterisk?

Hi guys…

I created a /var/run/asterisk on my virtual box (ubuntu 8.04), this is where my asterisk will run. My problem is that everytime i restart my virtualbox with ubuntu 8,04 installed… the asterisk folder will vanish… it look like this /var/run… every time I start my asterisk service, I always add /var/run/asterisk and run a command sudo asterisk start…

I edit my asterisk.conf to run at dir /var/run/asterisk

can you help me with my problem??

thanx…