Basically what it says. Without more details about your living arrangements, I can't offer anything further. The best thing to do is contact your proposed lender and ask them to explain the terms of their refusal, although they are not obliged to divulge them, they may be willing to offer you a chance to sort out the information they have received.
And if you haven't lived there long you will not have utilities bills.Even if you are not on the electoral role at least utility bills going back 6 mths is usually enough.
More and more reliance is being placed on the electoral role and even with utility bills etc lenders still prefer to see your name on the list. At the end of the day, its a legal requirement to fill one in although Councils do not enforce this.
I would recommend getting hold of your credit record from experian and see if they have y