Nero 7 premium

Hi everyone
I recently moved up from Nero 6 to Nero 7, and it looks like the proces to create and continue a multisession might have changed. I like to save my photos to disc, and it used to be that when I wanted to write more files to the disc, nero 6 would analyse the disc, refresh the disc contents and allow me to add files to those already on the disc. Now, I find I'm writing new tracks on the disc, but only able to see the original track, with nothing extra added, although the file size has grown to indicate new data added. I know the files are on the disc, I just can't access them. Does anyone know how to create and continue adding files onto a disc so that they are all on one track?

thanks
pete