Thanks Analoguesat - I had thought of that and there is nothing on 10E to watch.
However I now realise that 9E is a new satellite and it was never in my original configuration. What threw me was that Pli don't provide a facility to add new satellites.
I have now fixed it. For the benefits of others this is how i did it. From another post I found the link to **
tp://www.satellites-xml.eu/ and I downloaded the transponder settings for 9E. I inserted 9E settings into to my satellites.xml and copied it to var/etc.
I rebooted the Dreambox and then I was able to add 9E to my motorised settings and then scan it.