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Nat ports greater than 65535?

I used a route-map to forward a large range of ports to a static IP. Soon after I implemented the NAT commands the router stopped responding and then rebooted.

"sho ip nat trans" showed the following:

icmp 216.100.100.37:1700322640 192.168.100.251:1700322640 63.65.190.161:1373 63.65.190.161:1373

I used the following lines to configure the NAT port range forward.

access-list 112 permit tcp host 192.168.100.251 range 6881 6999 any

!

route-map MyNat permit 10

matchip address 112

!

ip nat inside source static 192.168.100.251 216.100.100.37 route-map MyNAT extendable

The existing NAT commands were:

ip nat inside source static tcp 192.168.100.251 12435 216.100.100.37 12435

ip nat inside source static udp 192.168.100.251 52145 216.100.100.37 52145

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