rails link_to not works when navigated to any entity -

i cannot navigate or post when there parameter on url (when navigated entity)

<a href="/xxx">xxx</a> works when @ url like

http://localhost:3000/xxx

but when @ url has entity parameter like

http://localhost:3000/xxx/12

non of <a\> tags work , non of remote form posts work

when attach mouse click on chrome, saw on url http://localhost:3000/xxx jquery function below returns undefined (the situation navigation works without problem), when on url http://localhost:3000/xxx/12 function returns jquery.fn.init[0]

the function (jquery excerpt) this

if ( !( eventhandle = elemdata.handle ) ) {         eventhandle = elemdata.handle = function( e ) {              // discard second event of jquery.event.trigger() ,             // when event called after page has unloaded             return typeof jquery !== "undefined" && jquery.event.triggered !== e.type ?                 jquery.event.dispatch.apply( elem, arguments ) : undefined;         };     }