Great plugin from command line – cant get it to work in Nagios!?

Hello,

works great from the command line,

./check_cisco_ucs -H x.x.x.x-t class -q topSystem -a “name address currentTime mode” -e “stand-alone” -u username-p password
OK – Cisco UCS topSystem (name,address,currentTime,mode) ServerName,x.x.x.x,Mon Jun 24 17:29:28 2013
,stand-alone (1 of 1 ok)

When i add as a Nagios service check, i just get status unknown “error: EOF”?? Any ideas?