Recently I'm losing my faith in Apple, looks like the days when used Linux on my PC and spent most of the days configuring things 
Well, so I have a Netgear wireless router and an Airport Express which I want to join the network so that, for example, I can stream web radios thru my hi-fi. I have been able to achieve this but it doesn't last that long

Well, let me explain the problem in detail.
When I try to configure the AE I can't browse for the device, i.e. I'm not able to find it. Then I need to do an hard reset of the AE. After this usually I can find it and configure the damn thing and let it join the Netgear network and use it (even if often get the infamous 3256 error in iTunes). The main problem is that after I shut down the MBP and turn it on again, I have to go thru the whole procedure. Should I reconfigure AE every time I want to use it ? This doesn't sound normal. Please help me! I'm getting mad with this stuff. Don't really now what I should do.
Well, so I have a Netgear wireless router and an Airport Express which I want to join the network so that, for example, I can stream web radios thru my hi-fi. I have been able to achieve this but it doesn't last that long
Well, let me explain the problem in detail.
When I try to configure the AE I can't browse for the device, i.e. I'm not able to find it. Then I need to do an hard reset of the AE. After this usually I can find it and configure the damn thing and let it join the Netgear network and use it (even if often get the infamous 3256 error in iTunes). The main problem is that after I shut down the MBP and turn it on again, I have to go thru the whole procedure. Should I reconfigure AE every time I want to use it ? This doesn't sound normal. Please help me! I'm getting mad with this stuff. Don't really now what I should do.