Bluetooth disconnect with android phone

Hello,

ive bought Dialogues on the App Store. So after pairing my Htc One S with my Mac Mini (late 2012 with version 10.8.4) I saw that the Bluetooth connection disconnect after 3-5 seconds. I restart my mac and my one s. Tried it without Dialogue, but it disconnects after 3-5 seconds again.

Does anybody knows the Problem and have a tip for me?

Thanks in advance

Benedikt