mini2440 - ADC conflit with Touchscreen ?

Hi everyone. 
I'am meeting a problem such as: I use ADC AI1 con4 mini2440, when i touch
Touchscreen, ADC value change. 
Please help me problem. why ? and fix 
PS. I use C#.net to read ADC
Thanks everyone.

Because ADC0, 1, 2 and 3 are used for the touchscreen (from memory).

Fix ... use one of the remaining ones.

Thanks Davef. 
Can you show me how to fix problem ?

For WinCE I have zero experience.

For Linux I could give you some links to ADC related stuff.  Also, here is
a snippet out of the Pengutronix QuickStart guide:

8.14 ADC
Getting the digital equivalent of one of the analogue input channels can be
done by reading the corresponding
entries in the sysfs.
For example the analogue input channel 0 on the Mini2440 is connected to
the potentiometer W1. By reading the
entry /sys/devices/platform/s3c24xx-adc/s3c-hwmon/in0_input we can watch
the different digital values while
turning the potentiometer W1.
Note: The analogue input channels 4 ... 7 are occupied by the touchscreen
feature and can only be used as simple
analogue inputs if the touchscreen feature is disabled.

Looks like I got the wrong channels in my previous post :(

Also, http://www.friendlyarm.net/forum/topic/2652

Linux again:
http://www.friendlyarm.net/forum/topic/974