Who sees my stupid mistake?

[RuudNL]

In the meantime there is some progress:

CMCON =  7                                       ' Digital mode
DEFINE OSC 20                                    ' 20 MHZ OSC.                                                                      
TRISB= %00111111                                 ' PORTB 6/7=Output 0..5=Input

Progstart: 
  if (PORTB & 1) = 1 then 
    Serout2 PORTB.7, 16384+12, [144, 44, 127]    ' Rewind
  endif  
  if (PORTB & 2) = 2 then 
    Serout2 PORTB.7, 16384+12, [144, 46, 127]    ' Fast Fwd.
  endif  
  if (PORTB & 4) = 4 then 
    Serout2 PORTB.7, 16384+12, [144, 48, 127]    ' Stop  
  endif  
  if (PORTB & 8) = 8 then 
    Serout2 PORTB.7, 16384+12, [144, 50, 127]    ' Play  
  endif  
  if (PORTB & 16) = 16 then 
    Serout2 PORTB.7, 16384+12, [144, 52, 127]    ' Record
  endif  

Debounce:
  Pause 100                                      ' ? shorter ?
  If (PORTB.0=1) or (PORTB.1=1) or (PORTB.2=1) or (PORTB.3=1) or (PORTB.4=1) then
       goto Debounce                                ' Button still pressed?
  endif  
  Goto Progstart

This works, as long as I comment out these lines:

 '  If (PORTB.0=1) or (PORTB.1=1) or (PORTB.2=1) or (PORTB.3=1) or (PORTB.4=1) then
 '     goto Debounce                                ' Button still pressed?
 '  endif

The idea is of course to prevent that the same data is sent multiple times, so I want to wait until a button is released.
But the these lines seem to avoid that PORTB is read again.