$dbm = dbase_open($dbname, 2);
  for ($i=$kdy_od; $i<$kdy_do;$i++) {
    $pol=1+$kdy_d*24*2+6*2+$i+1;

//*****This line is problem*******
dbase_replace_record($dbm, $def2, $pol);
//***********
  }
  dbase_close($dbm);
-----------------------------
If i run my php script on Linux system:
  The IE write me:    the page contains no data.
If i removed the line >dbase_replace_record($dbm, $def2, $pol);
 the display me data OK. The worst thing is
that  
  If I try run this script under OS WINDOWS 98
with installed APACHE & PHP3
the script is OK!!!.

So problem {i think} is in linux version of PHP