stop graphing in Cricket

Dear all i configured new server for cricket on freeBSD  and it is working fine up to 1 month but after that it is stop collecting any thing when i do manual collecting it collect but after that it is stop when i check the /usr/local/cricket/cricket-logs/normal.0 i will put the sample result :

[06-May-2008 13:18:49 ] Retrieved data for users (): 0
[06-May-2008 13:18:49 ] Retrieved data for processes (): 71
[06-May-2008 13:18:49 ] Retrieved data for memory (): 1094900,1953564

and when i check the apache log file it give me the following result   ( tail -f /var/log/httpd-error.log ):
==================================================================================
[Tue May 06 12:47:43 2008] [error] [client 84.235.114.10] [06-May-2008 12:47:43*] Found unknown tag 'router' during expansion of 'igwcommunity@%rou...'., referer: http://cricket-server/cricket/grapher.cgi?target=%2FGATEWAY%2FBackbone
[Tue May 06 12:47:43 2008] [error] [client 84.235.114.10] [06-May-2008 12:47:43*] Found unknown tag 'router' during expansion of '%router%'., referer: http://cricket-server/cricket/grapher.cgi?target=%2FGATEWAY%2FBackbone
===================================================================================
my cricket version is cricket-1.0.5  and when i go in one directory for example to see the default file 

This is the first 6 line in the Default in Gateway directory 
 ============================================================================
Target  --default--
    inst        =   map(interface-name)
    snmp-community    =   igwcommunity
    snmp-host   =   %router%
    snmp-version=   2
    target-type =   standard-interface

================================================================================
now every graph give me nan can any one please help in this i am new in cricket .

Best Regards 

Nizar 
-------------------------------------------------------------------------
This SF.net email is sponsored by the 2008 JavaOne(SM) Conference 
Don't miss this year's exciting event. There's still time to save $100. 
Use priority code J8TL2D2. 
http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone