error msg when using AC-3 encoder from Scenarist

[Pleadius]

Hellow everybody:
I have searched the web site and can't see to find the answer to the problem that i have.

Here goes:
i am using Scenarist 2.7. when using the AC-3 encoder, i put all the audio file as it correspond (no LFE enabled) . Keep in mind that i have only one audio file that was exported from Adobe Premiere (ver 6.0, I assuming that it's a single channel. So when i click on the "start Encoding" button, i get an error message:
"Error : C:\Documents and Settings\snoopy\Desktop\DVD projects\wedding\EXPORTED MPEG\Wedding capture 1\capture 1.wav : Channel Number != 1"

I can't seem to encode this, what am i doing wrong?
I have tried everything that i can come up with, without any solution. Can someone please tell me what i am supposed to do?
I have heard as well about the Besweat for encoding to AC-3, it is better than the scenarist one?

please some one help me with this. Sorry if this was answered before but i can't seem to find it. I appreciate any one who can help me.

[Crazyjoe]

You need Mono Wav files for the AC-3 Encoder! You will have to split you Stereo Wav to Mono with an Audio Editor. :)

If you mostly work with Stereo (or Dolby Surround) sources you might want to take a look at Sonic Foundry Soft Encode 5.1. Sadly the program isn't distributed anymore, but it will interpret Stereo Wavs automaticly as DD 2.0.

[Zeppeliner]

You can use a stereo wave file as input if you check the box saying "2-channel interleaved file"