[smokeping-users] Graphs Appearing but no reading

[mrtg user]

Dear Smokeping users,
i m new to smoke ping i have installed the smokeping and its working fine just the problem is msopkeping is refreshing but not plotting any readings only blank graphs...
can anyone tell me the issue!!!!
i have mentiond the permissions to apache to the img dir 
 
Really in trouble Smokeping user


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