Plugin – triggered a fatal error

Hi, i’m new to WordPress.
I uploaded WordPress, and installed it, it works like a charm. But when i uploaded the WP e-commerce (http://www.instinct.co.nz/e-commerce) plugin, and try to activate it, i get the following error: Plugin could not be activated because it triggered a fatal error.

Can anyone give me some hints on what to do? 🙂

Here is the phpinfo from the server where it’s hosted:

System FreeBSD web23416.talkactive.net 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007 root@dessler.cse.buffalo.edu:/usr/obj/usr/src/sys/SMP i386
Build Date May 30 2007 13:23:59
Configure Command ‘./configure’ ‘–enable-versioning’ ‘–with-layout=GNU’ ‘–with-config-file-scan-dir=/usr/local/etc/php’ ‘–disable-all’ ‘–enable-libxml’ ‘–with-libxml-dir=/usr/local’ ‘–enable-reflection’ ‘–program-prefix=’ ‘–enable-force-cgi-redirect’ ‘–enable-fastcgi’ ‘–with-apxs2=/usr/local/sbin/apxs’ ‘–with-regex=php’ ‘–with-zend-vm=CALL’ ‘–prefix=/usr/local’
Server API Apache 2.0 Handler
Virtual Directory Support disabled
Configuration File (php.ini) Path /usr/local/etc
Loaded Configuration File /usr/local/etc/php.ini
Scan this dir for additional .ini files /usr/local/etc/php
additional .ini files parsed /usr/local/etc/php/extensions.ini
PHP API 20041225
PHP Extension 20060613
Zend Extension 220060519
Debug Build no
Thread Safety disabled
Zend Memory Manager enabled
IPv6 Support enabled
Registered PHP Streams php, file, data, http, ftp, https, ftps, zip, compress.zlib
Registered Stream Socket Transports tcp, udp, unix, udg, ssl, sslv3, sslv2, tls
Registered Stream Filters convert.iconv.*, string.rot13, string.toupper, string.tolower, string.strip_tags, convert.*, consumed, zlib.*