gas/heating bill in collection

in 2005 the building i lived in did not have instalation in the whole house i didnt know that until the gas people came out to look at the meter i bought heaters my family and i slept in one room it was so high i asked my daughter to help she put the bill in her name and i kept on paying on the bill i moved the bill came with me i then had the bill put back in my name so now im thinking my daughter is clear now 2010 my daughter get a bill for 1,4oo.oo for the old bill her gas /heat got turned off but what i dont understand is how come im paying for the old housre and paying for the new house to