Hi, i've installed wirelesstools to use aircrack, and now i have a problem. If i open the network manager, it says "no connection avaliable", even though there are some.
Moreover, if i reboot my device, when it starts back it automatically connects to my home network, and it works perfectly. But, if i disconnect, then again "no connection avalaible".
Any ideas?

Ok, new update.
Apparently this problem isn't caused by the wirelesstools, but by the aircrack itself.
It's like this:
Boot the device, and the wifimanager work perfectly; U can connect and disconnect how many time u want and still see wifis.
Once u run airodump-ng, u'r screwed. If u disconnect from a wifi, then u can't use the connection manager anymore. But the wifi still works (and so does airodump, which still sees all the wifi around you.)
Any ideas? Maybe some daemon which isn't closing fine?

That's because the wifi device is in monitor mode.
Just type as root (you need to have wireless-tools installed):
iwconfig wlan0 mode managed