[SyncEvolution] unsupported transport type?

Hello, I finally tried to synchronize my Horde server with KDE PIM and found SyncEvolution as an interesting solution. First I have followed the instructions in HACKING and used git://git.moblin.org/syncevolution.git to compile from source. I started with addressbook only and I got it synchronize to a folder with files successfully. But I had read actually that it should also work with Akonadi directly and found then the GIT repository at git://gitorious.org/meego- middleware/syncevolution.git that seems to support it. I have started with a new configuration, but I could not get the synchronisation to work anymore. I always get the error message: "unsupported transport type is specified in the configuration". The horde server is accessed trough https:// and I use CURL in syncevolution. It seems as if it never gets into "if (!gmainloop) {" inside the function SyncContext::createTransportAgent() in src/syncevo/SyncContext.cpp. I tried to change that and I got much more debug output, but failed with other error messages later. Do you have an idea what the problem could be or where I could start debugging? Regards, Klaus