Map & Hosts are showing , but while searching i get always "Nothing found" - map search funtion not working

Hi ,
i successfully installed the maps module. it is showing the map, variables are working as they should
hosts are shown according the variables … so from my point of view all is working as it should
but i have the issue , that if i search for a address it returns always “nothing found”
so Searching the map is not possible

any idea how this could be resolved