There should be data for channel 7 in the EIT and MHEG5 data streams. Note that there are multiple channels in Melbourne, 7, 70, 71, etc. and that at least one has no EPG data associated with it. I'm not near my HTPC to check.
Make sure you are trying to pull data for the correct channel, that all channels play correctly, and if necessary clear the MC EPG and reload as this sometimes helps.