Naturalisation

I Need serious help, as I dont know what I have to do next, my naturalisation has been rejected recently. I have been living here since Feb 2006, having independent status as a Gerant of a SPRL. I am not european but have 5 years unlimited card, my professional card is also valid till 2017, Its my principal living place since 2005, as my work is based here. I also have a child, who born here. I am highly tax paying person. Never asked about any single benefit here. I have various strong ties in Belgium. Please advise, what I should do next.