When the iLiad says "unsuccessful" it's because it tries to connect to an SMB file share (the one you configured in the settings for computer synchronization). You must either setup linux and samba as mentioned in the iRex forums or install the Companion Software (or set up a matching file share yourself) on Windows. If you have done so, check (and double check!) the parameters you put into the configuration.
And yes, I know it is very annoying that it seems to be a network error when it really is a "connection refused" or "authentication failure" or any other error. It buggers me when people stupid down their error messages because it is too difficult for people to understand. "It's not working" is a very bad start in a troubleshooting process.
/R