I understand what your problem is quite clearly. Obviously you don't.
My only suggestion is to turn off a completely unneccessary service to see if thats causing your problem. If your download manager hasn't found the server by now it never will. Beyond that, the reason that you use a download manager is to resume partial downloads. So turning it off for a week or a even month won't matter. Unless your trying to download SP2 if you have Cable access a download manager is a complete waste of resources. Even then its little more than a toy.
Maybe somebody else can help you.
** **
We use our powers for good, not evil
** **
Logic is a systematic method of coming to the wrong
conclusion with confidence.