IE .post problem(?)

IE .post problem(?)

Hello, i do have a button where i use the .post() function to send via a file queries to insert stuff in the database.
it looks really simple like this:
  1.         $.post('file.php',
            {
                editpost:myvar
            },


  2.         function(result) {
                $('#msg').html(result).show();
            });

so when i click the button it works fine but on IE sometimes it crash or i dont know how to say it , it doesnt execute the ajax and when i try to reload the page it takes some time to fully load after this happen , can this happen due to my php code inside the file.php or it may be a html thing?

thanks