Have you let crossepg download as well?
If you have your m3u file then you can use something like echanneliser to export your bouquet from your box and then import the channels back once you have imported you m3u files in.
Have a look on YouTube as there are plenty of clips on there on how to do this.
I had a bit of messing around getting mine to work but did eventually.
Everytime I bring it up from deep stanby I just need to run croessepg and epgimport and then it pulls them in.
Have now set epgimport to do this automatically as of last night so hopefully this may save me having to do it manually. Not that its a big issue.