The following is the template I use for configuring Netflow on the Cisco 1941.
//Create the Flow Exporter - This example uses Netflow v9. Output-features and export-protocol are REQUIRED for sending Netflow over an IPSEC VPN
flow exporter EXPORT
description Netflow Exporter
destination 192.168.1.11
source %SOURCEINTERFACE%
transport udp 2055
export-protocol netflow-v9
output-features
template data timeout 60
!
//Create the Flow Monitor - This example uses the default Netflow records
flow monitor MONITOR
description Netflow Monitor
record netflow-original
export EXPORT
cache timeout active 120
cache
!
//For interface to be monitored, enter the follow
ip flow monitor MONITOR input
(For example,
int gi 0/1
ip flow monitor MONITOR input
int fa 0/2
ip flow monitor MONITOR input)
This template has worked flawlessly for months. I hope it helps!!