Cannot get data out of the QUEUE

On my Linux virtual box only the QUEUE option of iptables is working. I guess this is a compatibility mode with old versions.
The packet queuing is working (one can see it in iptables counters (-vL)), but the problem is getting the packets from the queue.

I tried the libipq sample but the function ipq_set_mode() gives an error "Failed to send netlink message: Connection refused".

How can I use at least the old QUEUE method (ie. queue 0) ?

Loading of any newer kernel modules (NFQUEUE etc) is unfortunately not possible because it is a rented box and the hoster rejects to load any other modules.

Just one queue would be sufficient for me.
Any help very much appreciated, also info about alternative methods/libraries.