Joint ownership of a private road

Sir, This regarding a private road to my house. As per the base document two persons had joint right on it. I bought a house from one of these joint owner and as per base document he transferred his right on this road ,which is the main and the only passage to the house I bought. At the time of the purchase of the house the base document of this private road was in the hands of the other joint owner and my first owner and I had only a copy of the same. As he had with him the original document, he has been paying the land tax on it. During the last few years, both the original owners soled land adjacent to this road and as a result , now besides me and the one of the first owner, there are three more persons having the right on it. The road is also using many other people near by this. But now the problem is , one of the original, who has been paying the tax, claims that he is the sole owner of this road because he is paying the tax and everything related to this road will be decided by him. What will the right for me and other new members?