Cacti graph problem for Mikrotik router

[debashish]

Hello I am a new user this forum. Please help me............
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After Installed the cacti i added all scripts and template for mikortik router properly. The cacti graph for mikrotik Simple queue is coming automatically but after some times later the graph is stoped autometically. But when i entering the mikrotik router then the mikrotik Simple queue graph is coming again. Why it is happening ??? Please HELP..........
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