No longer have the ability to drag forms fields with the mouse just the arrow keys

When creating a web form (inside the web app) i am dragging fields from the right hand menu like drop down boxs and text fields.    i no longer have the ability to move the fields with the mouse.  The only way to move them now is with the arrow keys. wheni have the mouse over the fields i get the drag symbol but no dragging happens.  last week i was able to and i have rebooted, cleared my internet temp files, and even logged into my account from a different computer differnty side of town and get the same result.   please help moving and dragging with the mouse gone is a HUGE pain