SBS 2003 Exchange

Have backed up the “first storage Group”, and dilligently backing up every day,
The server HDD crash lossing everything, had to rebuild the server from scratch, restored the data OK, but now come to restore the “mailboxes” but on the right pain of the backup screen is says no entries! Have looked at several tapes and on another server using MS backup and they all say “no entries found” yet there appears to be backing up the mailboxes. I have followed the instruction from begining to end and still the restore fails.
Need urgent help as it is Saturday and need to be up and running by Monday 10/04/04 (Australian Std time)