Ok well i get wut you mean now, you installed myvbindex not vbindex
Anyways the installation states to replace the first line of code you showed --
Replace--
eval("standardredirect(\"".gettemplate("redirect_l ogin")."\",\"index.php?s=$session[dbsessionhash]\");");
With--
eval("standardredirect(\"".gettemplate("redirect_l ogin")."\",\"\$url\");");
Thats it, Does this answer your question?