18F8722 PortF Problem

Hello
I am using a PIC 18F8722 and I am having a problem reading PORTF. I ran into a problem reading the portf in a project of mine and this code I am just testing it to see what happens.

In the code below I set portF to a certain value and then make Temp1 = to PortF to display on a LCD. When the program runs I get all 8 outputs of the pic to turn on but I get a value of 128 to display on the lcd. If I change PortF to any value below 128 I get 0 to display on the LCD. No matter what value I put in I always get the right state on the 8 output pins. I have no Idea what is going on.
DEFINE OSC 40 'Define clock freq. 40MHz
pause 1000
TRISF = 0 'Define PortF TRIS Register.
TRISC.0 = 0 'Define PortC TRIS Register.
LCD Var portC.0 ' LCD Data debuging pin.
Temp1 Var word
PortF = 255
Temp1 = PORTF
Serout2 LCD,16468,[12,DEC Temp1 ]
pause 3000
end


Thanks
Shawn

Port F on that chip has some analog features. You will need to turn that off.

Thanks Dave
Turning the AD Module off does not fix the problem but you got me thinking. After I turned the AD module off, I changed ADCON1 0-3 to all digital and that did the trick. Thanks again for the help. I would have beat my head for awhile without your post.

Shawn