problem with TeXwork

For some reason MiKTeX forum is quiet and any email that I send there disappear. So I posted my question on this forum. May be somebody has an idea.

I used TeXwork to display PDF which I develop; mainly because when I compile PDF file, TeXwork does not prevent compilation and automatically refreshes PDF file. However after recent changes, TeXwork lost this option. After compilation screen may become gray and in status bar I see that I watch page -1 of 0 pages. When I close the window and reopen it again, I see modified text. I appreciate any help

Aleks Kleyn
http://alekskleyn.dyndns-home.com:4080/  
http://sites.google.com/site/AleksKleyn/ 
http://arxiv.org/a/kleyn_a_1  
http://AleksKleyn.blogspot.com/
http://KleynAleks.blogspot.com/

Derivative in Banach algebra
dx2
=1⊗ x+x⊗1
dx

  d x2 =(1⊗ x+x⊗1) ◦dx=dx x+x dx