Bread-Bakers v110.n020.5

I have had my trusty Breadman Ultimate (TR2200) for nearly 15 
years.  About half way through the second kneed, the dough starts to 
stick to the paddle, so instead of kneading he dough, it just spins 
around.  I don't think that there is a problem with the consistency 
of the dough, but I could be wrong! Does anyone have any idea what 
might be causing this, or what I can do to prevent it?

Thanks,

Keith