How to get data from Cisco device to netflow analyzer !!!!

How to get data from Cisco device to netflow analyzer !!!!

Hallo,
 
i need HELP!!!
 
i would like to use the Netflow Analyser, but i don't get data to netflow from my Cisco Switches.
I don't know how to configure my switch.
We managed and configure our switches over the cisco network assistant.
We use a Cisco WS-C4510R-E Switch
 
I hope everyone can help me
 
MFG

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