Hello again,

Finally I was able to locate (not explain) the "problem":
typedef adjacency_list <vecS , listS, directedS, VertexProperties, EdgeProperties> Graph;
listS for the VertexList is obviously not working... So I changed it to vecS - but an explanation would be nice...
Because even the tutorial says it is okay to use listS or am I wrong?
http://www.boost.org/doc/libs/1_35_0/libs/graph/doc/using_adjacency_list.html#sec:choosing-graph-type

thx anyway :D