snmp replies not printed

Hello, I have installed php 4.1.2 and ucd 4.2.4 both from tarballs on a linux box, and compiled php both as an apache module and standalone (same options, except for the --with-apxs). Now, when I use snmpwalk or whatever other function from within apache, it works (almost) correctly: snmp_set_quick_print causes php to return both the OID and the value although the manual says different, but I can live with that. the problem is that a simple script run from the standalone interpreter on the same machine behaves very strange. Example: #!/usr/local/bin/php -q <? snmp_set_quick_print(1); $test=snmpwalk("1.2.3.4","public","system"); for (reset($test); $i = key($test); next($i)){ echo "$test[$i]\n"; } does not print ANYTHING (nothing in php.log, also. I have error_reporting = E_ALL in php.ini) but if I do a snmpget("1.2.3.4","public","system.sysName.0") I get system.sysName.0 sysName not set which is (almost) correct. the snmp* commands from the ucd-snmp package work just fine. Does anyone have some clue on what could have happened? Thank you.