Problem with scripts

[syncro]

I have a scripts run well outside , but spine return "U"

I run ./spine --verbosity=5 93 93
Poller[0] Host[93] DS[3878] SCRIPT: /usr/bin/perl /home/cacti/cacti/site/scripts/aaa_ck_err_idletime_rp.pl , output: 2884

but in the log :
03/15/2010 08:35:02 PM - SPINE: Poller[0] Host[93] DS[3878] SCRIPT: /usr/bin/perl /home/cacti/cacti/site/scripts/aaa_ck_err_idletime_rp.pl , output: U

I dont known why , can anybody help me ?