csInterface.evalScript not working correctly

Hi guys. I am pretty much stomped on this one. I am sure I'm making a mistake but I can't see it. Maybe more eyes will help.

Here's what is happening:

I get ad alert from LogRead JSX function on startup which is blank. This works just fine. The second time on a triggered event in the main.js it does not alert which means it's not working, nothing happens

Here's the code snippets:

MAIN.JS - ON START UP

csInterface.evalScript('LogRead(\'\',' + logfilepathname + ')');

HOSTSCRIPT.JSX

//save a text file or write new data

function LogRead(newfiledata,filepathname){

    //read data

   alert(newfiledata);

    var vfiledataread = FileDataRead(filepathname);

    if(vfiledataread == ""){

        //create settings file if not created

        FileDataCreate("theme: Default__",filepathname,"w"); 

    };

    if(newfiledata > ""){

        //write update new data to file

        FileDataCreate(newfiledata,filepathname,"e");        

    };

};

MAIN.JS - ON EVENT TRIGGER

csInterface.evalScript('LogRead(' + newstreamdata  + ',' + logfilepathname + ')');

Advice appreciated, thanks!