problems with onewire ds18b20 and analogread

Hi everyone,
I’m compiling a sketch in order to sense the temperature with a Dallas DS18b20 (that uses onewire protocol) and to drive a peltier cell (I’m using the Droids tank 3a-hp bridge). Everything works fine but when i try to connect the current sensing pin of the bridge to an analog pin of the arduino the ds18b20 stop working…
And how this can be?

Not enough information provided... I would read through this again, assuming you have already. Next I would recheck all my connections. Sometimes it's best to just undo everything and rebuild.