Right think i am losing the plot.

Just upgraded to the new version, i went from 41 to 61.

Now i am confussed, i loaded the disc it said it was upgrading and would take 6 mins.
It then said ok and was loading settings, all groovy.

Then i pressed ok, but it started the process all over again.
I went to the boot and noticed that after the loading stage it chucks the cd out.
Now i thougt ok, maybe i should put my old cd back in (now is this right or wrong)
The system works ok, and says version 61, but i still have NO POSTCODE SEARCH
Is this because i put my old cd back in or something else???

Nick