PA: module-rtp-recv: Sink does not exist

Question

Hello Archers,
I really would like to route my primary computer's sound via RTP to a remote machine (a laptop, which is used as my home server).
Both machines have Pulseaudio set up and local playback on both works fine.
Unfortunately on the remote machine, I cannot load the RTP receive sink. I tried the default PA package (1.1-1) and compiled pulseaudio-git, but still the same issue.
$ pulseaudio --version
pulseaudio 1.98-dev-186-g07e47
$ pulseaudio -nC
Welcome to PulseAudio! Use "help" for usage information.
>>> load-module module-rtp-recv
>>> E: [pulseaudio] module-rtp-recv.c: Sink does not exist.
$ ls -la /usr/lib/pulse-1.98/modules/ | grep rtp
-rwxr-xr-x 1 root root 38460 Dec 28 13:38 librtp.so
-rwxr-xr-x 1 root root 26264 Dec 28 13:39 module-rtp-recv.so
-rwxr-xr-x 1 root root 17984 Dec 28 13:38 module-rtp-send.so
Configs on remote machine:
default.pa
system.pa
The only thing I could find on Google was the same issue with a 0.9 version, which seemed to be a bug in PA. But I cannot imaging, this is still an issue, as I think some of you use an RTP setup with PA successfully.
Is there any possibility to debug that issue?
Thanks in advance,
R.

Answer 1

It seems to be internal to Pulse Audio, which is what I use by default.  I don't even think I use gstreamer.
It works fine if I change it manually in pavucontrol, I just want the option to stick.  Any other ideas?