Characteristics notifications/indications stop problem!

Hi,

I have the problem using Indication on characteristic.
If I connect to my device and use "SetCharacteristicNotification(myCharacteristic,true);" I get an update on my characteristics everytime they change, but if I disconnect, not closing my app, only disconnect my app from the device and reconnect to the same device and set characteristic again, I get a double indication, and if I do this three times, I get three indications.

So my problem is: How can I stop all indications or see which is still active after bluetooth disconnect.

Thanks in advance.