Restoring archive

I am trying to restore an Online 5 level 0 archive to a another machine as part of a test exercise. I am pretty sure that I have set up the chunks correctly and the whole /usr/informix is from the same time the archive was run so I have got the correct tbconfig. When ever I run tbtape -r I get the following: " Please mount the first system archive tape and press Return to continue ... Restoring system control information, please wait ... Tape block size =32 K, total size =2292768 K. Mismatch in config. file. " The funny think is that I have restored from this archive before, the only reason I am redoing it is that I made a mistake with the link used to create the chunk. What am I missing??? Thanks William