Hi Lulublue,
Thanks again for coming back to me.
Checking things today it doesn't look as if you have a My VM profile for your account. You will need to register this.
Once you have a My VM account, you can then use this to log in to Sky Sports.
If you are using log in details already then it sounds as though you're a previous customer and using old details.
Pop back and let us know how you get on with registering your My Virgin Media account.
Thanks,