Putting a new gasket on a Zanussi Aquacycle 1200 washing machine?

The gasket on my Zanussi washing machine became detached after I cleaned it a bit too vigorously. I took it off completely to clean and inspect it and now want to re-attach it. The front of the seal (the bit inside the machine) is held in place with a circular spring band. I'm finding it difficult to re fix it. Any tips please?