Korg Poly800/EX800 Users

I went to radio shack and got a 3V Lithium battery and instaled it 
in my poly 800. Though some features seem to be working 
better, it is still kinda messed up. 
 Since the battery replacement, I can now program patches 
however, it dosn't seem to save them after I power down. The 
tape interface dosn't seem to be working as well(keep getting 
errors) I think that the problem is deeper than the internal battery.
eric