Legal action

We three sibling have inherited a two storied building which was is in my mother name. We wish to sell the property. but the problem arises now is the neighbor from whom the vacant land was brought my parents now misleading interested purchaser saying that the way to our property was not registered with our name and if somebody purchases the property they will not be given access as the said path way is still registered in his (neighbor's )name.Although there is no mention in the deed about the path (the only way to our property).The building was constructed over 20 years back and no objection has been raised till last years.He even does not dare obstructing the way but misleading the interest purchaser. As we resides far from the property we we could not control his behavior.He has been doing this for personal reason and has no interest in the property but doing so for personal grudge.Even we know he can not block the way by virtue of Easement Act ,anyway but we fall prey to his behavior as he has been successful in misleading the interested purchaser. As a result we are losing customer. Now my question is how could we get rid of this legally.