Bind DNS server not resloving

[Kebba Foon]

Hi

I have been experience DNS resolutions problems these past few days, if
i run nslookup i get this error: 
;; connection timed out; no servers could be reached

with dig +trace i get:


; <<>> DiG 9.6-ESV-R1 <<>> @<my ns server ip> espn.com +trace
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached

am not sure exectly whats is causing these time outs, the strange thing
is that it works sometimes for a brief time and stop.

The network does not seems to be the problem as i can run a traceroute
from the server and also if i run a traceroute from dnsstuff.com


my server is Debian 5.0 lenny and the bind version running on it is
9.9.6-ESV-R1.

any help will be greatly appreciated.

Thanks