What's wrong with Linux compilation

Hello,

I'm having a problem compiling OgreDotNet's CVS.

So, first of all, I'm getting OgreDotNet via CVS

cvs -d:pserver:anonymous@ogre.cvs.sourceforge.net:/cvsroot/ogre login
cvs -d:pserver:anonymous@ogre.cvs.sourceforge.net:/cvsroot/ogre co -P ogreaddons/ogredotnet

this seems to be ok

then I'm going to the ogreaddons folder (cd ogreaddons) and I untarize (lol) the Linux touch :
tar -xzvf ogredotnet/ogredotnet.linux.tar.gz

and now, I thought autogen.sh (launched from ogreaddons/ogredotnet folder) was OK but...
./autogen.sh: 12: Syntax error: "(" unexpected

I'm searching for a day but... don't find anything. Any idea ?