multiple script processors not working in a row

Hello everyone,

I've been searching a solution for nearly two days now about this problem.
I have a web audio api app that catches the microphone input. In one 
script processor i'm windowing the signal with a hanning window, which 
works fine this way:

     source -> windowScriptProcessorNode -> audioContext.destination

Then i wanted to add another script processor like this:

     source -> windowScriptProcessorNode -> otherScriptProcessorNode -> 
audioContext.destination

but at the inputBuffer of the otherScriptProcessorNode there are just 
zeros instead of the signal of windowScriptProcessorNode.
Here is some code:


         var audioContext = new AudioContext();

         //get microphone input via getUserMedia
         navigator.getUserMedia({audio: true}, function(stream) {

             //set up source
             var audioSource = audioContext.createMediaStreamSource(stream);
             audioSource.buffer = stream;

             //set up hanning window script processor node
             var windowScriptProcessorNode = 
audioContext.createScriptProcessor(BLOCKLENGTH,1,1);
             windowScriptProcessorNode.onaudioprocess = function(e){
                 var windowNodeInput = e.inputBuffer.getChannelData(0);
                 var windowNodeOutput = e.outputBuffer.getChannelData(0);
                 if (windowfunction==true) {
                     windowNodeOutput = 
applyDspWindowFunction(windowNodeInput.subarray());
                 }else{
                     windowNodeOutput = windowNodeInput.subarray();
                 }
             }

             //some other script processor node, just passing through 
the signal
             var otherScriptProcessorNode = 
audioContext.createScriptProcessor(BLOCKLENGTH,1,1);
             otherScriptProcessorNode.onaudioprocess = function(e){
                 var otherNodeInput = e.inputBuffer.getChannelData(0);
                 var otherNodeInput = e.outputBuffer.getChannelData(0);
                 otherNodeInput = otherNodeInput.subarray();

             }


             // this connnection works fine
             audioSource.connect(windowScriptProcessorNode);
windowScriptProcessorNode.connect(audioContext.destination);

             /* // this connnection does NOT work
             audioSource.connect(windowScriptProcessorNode);
windowScriptProcessorNode.connect(otherScriptProcessorNode);
otherScriptProcessorNode.connect(audioContext.destination);
             */
         }

Did anyone ever connected two scriptProcessorNodes in a row? is there 
anything special, one has to account for??
Note that I use mono input and output for each node, i tested it with 
regular stereo, but that didn't made any difference to me.
Would be great if some could help me out!

Best regards,
Erik