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J-FLow version 9 supports other protocols such as IPV6 and MPLS .  To get good results we recommend you still only use a template for IPV4 with Version 9.  There are some subtle differences with the SRX models for the config so please refer to J-Flow SRX version 9 Config Examples

More Details on Configuring your Cisco Router

For reference: http://www.cisco.com/en/US/docs/ios/12_3t/netflow/command/reference/nfl_a1gt_ps5207_TSD_Products_Command_Reference_Chapter.html#wp1160995

I will discuss a very basic configuration.

On the interface you want to collect flow traffic from, add:

Now that you have an interface setup to gather netflow information you have to tell the router to send it somewhere:

If you enable that configuration netflow traffic should now be sent to your VM.

By default netflow will send information about flows after they are finished, if you would like to see information more often you can set the flow-cache timeout, in minutes, so this will send flow info every minute (see the docs for more details):

opFlow will now be displaying your data!  Visit http://<vm_ip_address>/cgi-omk/opFlow.pl and take a look! (also make sure you have a license)

ps. Authentication info for Opmantek modules is the same as it is for NMIS, the default is:
username: nmis
password: nm1888 

For more information and help with opFlow see its community homepage