WLAN makes problems

I have several 500 adapter in use and have been waiting for the WLAN 500 to replace my to 200 wireless adapter. Unfortunately, I put in the 500 wireless adapter repeatedly crashes with different wireless devices securely (Inet Radio, DLink and HuuTuu WebCam, etc.). Unfortunately a contact for support did not yield any findings.
A disconnection and reconnection of the WLAN using the button located on the adapter resolves the issue, that is, the devices connect and run again for a certain time until the problem reoccurs.
The old 200 wireless adapter into an outlet on the same terminals funkltioniert problems and does not correct the situation. For occasional use (surfing) falls, the error probably does not occur. Also seems the iPad and iPhone to have no problems. I will unfortunately have to return the adapter again, because it is so useless and it is not clear when a firmware update comes. SORRY !!