monitor cisco asr 9010 router

I used this to monitor Cisco ASR9010 CPU,memory, fan, temp, etc.
For CPU is ok. But when i monitor memory, the free memory is only 1%. then i contact to network guy. he check from CLI and output shows,
Physical Memory: 6144M total (4120M available)
Application Memory : 5887M (4120M available)
Image: 63M (bootram: 63M)
Reserved: 128M, IOMem: 64K, flashfsys: 0
Total shared window: 41M
Is there anything I need to change for memory?
For Fan, the output show, “Fans: OK – 0 Fans are running all good | total=0 err=0”
For temp, the output show
“[root@nagios01 libexec]# ./check_c4510.pl -H 10.110.40.23 -C nagios -t temp -w 45 -c 55
The switch 10.110.40.23 can’t report temperature via SNMP
Syntax Error! ”
Let me know what should i change?

Thanks for your plugin.