Does anyone have any idea why this wouldn't work? I get the error when trying to load the json from my server.

"Uncaught SyntaxError: Unexpected token :" when using JSONP and scripttag


Code:
Ext.regModel('MenuItem', {
  fields: [
    {name: 'id',      type: 'int'},
    {name: 'title',    type: 'string'}
    //{name: 'body',     type: 'string'}
  ]
});

MyDS.MenuStore = new Ext.data.Store({
  model: 'MenuItem',
  proxy: {
    //type: 'ajax',
    type: 'scripttag',
    url: 'http://1ldev251.iqsolutions.com/myds2-rpc/testing.json', // DOES NOT WORK, EXACTLY THE SAME CONTENT AS THE BELOW URL:
    //url: 'http://query.yahooapis.com/v1/public/yql?format=json&q=select%20*%20from%20flickr.photos.search%20where%20text%3D%22hello%22%20limit%2010', // WORKS!
    reader: new Ext.data.JsonReader({
      root: 'query.results.photo'
    })
  }
});