rrd files not updating with values from flowscan/CUFlow

[doncalli]

Hello people. I am getting zeroes in my rrd file ( found out by doing a rrdtool info <rrdfile>)and as a consequence, i am not getting any graphs being plotted. Now I created a error log for the flowscan service in the /var/log folder and if I check this error log, I get the following error messages

"sleep 300....
Use of uninitialized value in numeric gt (>) at /usr/share/perl5/HTML/Table.pm line 1684.
Use of uninitialized value in numeric gt (>) at /usr/share/perl5/HTML/Table.pm line 1684.
Use of uninitialized value in numeric gt (>) at /usr/share/perl5/HTML/Table.pm line 1684."

If i do a "ps -ef | grep flowscan", i get the following:
root 1335 1 0 Nov12 ? 00:00:28 /usr/bin/perl /usr/bin/flowscan
So you can see flowscan is running as a process.

If I do a "emacs /var/logs/messages, I can see the following:
Nov 13 08:45:00 localhost flow-capture[1117]: STAT: now=1194972300 startup=1194884906 src_ip=172.16.1.1 dst_ip=172.16.1.40 d_ver=5 pkts=8880 flows=220362 lo
st=0 reset=0 filter_drops=0
Nov 13 08:50:00 localhost flow-capture[1117]: STAT: now=1194972600 startup=1194884906 src_ip=172.16.1.1 dst_ip=172.16.1.40 d_ver=5 pkts=8923 flows=221652 lo
st=0 reset=0 filter_drops=0
Nov 13 08:55:00 localhost flow-capture[1117]: STAT: now=1194972900 startup=1194884906 src_ip=172.16.1.1 dst_ip=172.16.1.40 d_ver=5 pkts=8969 flows=223032 lo
st=0 reset=0 filter_drops=0

So the collector (my debian etch server) is seeing the flows from the router.
I have tested snmp to see if it was properly installed on the server and it is:

snmpwalk -c public -v1 -On 172.16.1.1 udp | more
.1.3.6.1.2.1.7.1.0 = Counter32: 15643753
.1.3.6.1.2.1.7.2.0 = Counter32: 1168400
.1.3.6.1.2.1.7.3.0 = Counter32: 0
.1.3.6.1.2.1.7.4.0 = Counter32: 1985483
.1.3.6.1.2.1.7.5.1.1.172.16.1.1.161 = IpAddress: 172.16.1.1

Another thing I noticed is that I seem to be getting snmp errors when I observe the cacti.log file, here is an extract:
11/13/2007 09:00:03 AM - CMDPHP: Poller[0] Host[2] DS[10] WARNING: Result from SNMP not valid. Partial Result:
11/13/2007 09:00:03 AM - CMDPHP: Poller[0] Host[2] DS[14] WARNING: Result from SNMP not valid. Partial Result:
11/13/2007 09:00:03 AM - CMDPHP: Poller[0] Host[2] DS[15] WARNING: Result from SNMP not valid. Partial Result:
11/13/2007 09:00:03 AM - SYSTEM STATS: Time:1.0853 Method:cmd.php Processes:1 Threads:N/A Hosts:3 HostsPerProcess:3 DataSources:15 RRDsProcessed:12


The raw flow file are being created alongside the "tmp" flow file but still the rrds all have 0's or NaN.

HELP!!!!
Thanks.