Need help with Pot command

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Hi everyone, I want to learn how to use POT command so I tried some codes and try also to simulate it on protues.

Include "modedefs.bas"	' Include serial modes
TRISB =%00000001
Portb =%00000000
' Allocate variables
x Var Byte

   CMCON = 7     ' Set PORTA to digital
   Pause 100     ' Wait for LCD to start

mainloop:
   Pot PORTB.0, 127, x
   Serout PortB.1,T9600, [$Fe,1]
   serout PortB.1,T9600,[" Pot ",#x] ' Send value to LCD
   Pause 100                 ' for delays
   Goto mainloop             ' Do it again

   End

I tried to play around with the variable potentiometer to see if its displays varies, but it jumps from 2-8-15-47-255. How can I make it increment by 1 to have a smooth display to 255? I tried to change the pot resistance between 5-10K but no luck.