Drag and drop issue

Hi there, having watched screen cast about Revolution was keen to get things going and was impressed with the drag and drop facility for snippets into content, however, having successfully used this on my local XAMP when I moved on to server cannot use this brilliant feature.
I try to drag the snippet into the content but it doesn’t do anything other than drag an image about the screen - I’ve loaded the tinymce and using this in creating resources.
Any suggestions how to correct this feature?