Seeking (multiple videos)

Hi,
I have a problem to get seeking working:
My application has a pointer to the manager class:
mVideoManager = (TheoraVideoManager*) ExternalTextureSourceManager::getSingleton().getExternalTextureSource("ogg_video");
And I set seeking enabled:
mVideoManager->setSeekEnabled(true);
This is done in a setup-function which is called before resources are loaded. In my application I start playing a video. It is strange that in that moment the mSeekEnabled-member of the manager is false. And it´s even more strange that only the first loaded video (the video which material is parsed first) has valid clip->mSeeker-member. On every clip the mSeekEnabled-member is false.
So as a result I can only seekToTime() correctly on the first video.
What did I wrong?
Thanks in advance.

Seeking and audio do not work at the moment.
seeking was inherited from pjcast's work but has to be redone.

First thank you for your answers!

But is there any possibility to play a video from the beginning after it was already played?

I tried to delete the video resources and to manually load them again, so I can play back a video again from the beginning but I had no success.
So a solution to this would save me some heavy headaches
Greetings

Good point, this is important. I'll work on this next.