I have server on centos 5.2 and there is installed phpbb3 premoded Portal XL.

And I have problems with RSS news pulling it into portal.

If I copy phpbb3 database and files on server where is installed fedora 12 it works all ok. But not on centos, where something is missing. I checked php modules and perl modules and all are the same. How can I check what is missing on centos that RSS pulling doesn't work and on Fedora works ok?