A connection error has occurred. Check the security settings for the network and try again.
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I googled it and found that there are lots of guys facing the exact same problem, but could not found the solution. I tried everything but of no avail.
At present i run my router
54mbps as suggested by few forums, and using no security.
P.S. Using this router i can access the wifi connection on my Desire S,
What type of encryption do you have on your router? PSPs may not support newer encryption protocols (WPA2). If use an older protocol like WEP or WPA, you may have better luck.
EditAfter some quick googling, I found this article which may provide some insight. It seems WPA2/AES doesn"t work, but you can use WPA2/TKIP-AES. Check your router"s administration settings and you should find an option to change this.
You mentioned that you"re running it at 54mbps which is the 802.11g (note the "g") standard. According to this, the PSP only supports 802.11b.
So, you"ll have to go into the configuration of your router and change it to 802.11b or, if it supports dual band, 802.11b/g. Unfortunately, if your router doesn"t support both at the same time, you"ll have to use the older, slower one (802.11b).
As was mentioned by Dave McClelland, the security method is also important, however if it is open as you say, it shouldn"t be what"s stopping you.
If you need to figure out how to change it, I believe there"s a copy of the manual here (under Documentation).
The PSP runs on an 802.11b network. If you are running your router exclusively in 54Mbps mode, that means 802.11g. I have found that even running pure 802.11g networks sometimes my PSP can scan them, but not connect.
If you are not running any security, you should be able to connect your PSP to your wifi network. Commenters on a previous answer mentioned you can (or cannot) connect to an unsecured access point. I have found that there is some credibility to this. I have had issues in the past, connecting to my own unsecured AP. It does not happen in all cases however, and I would suggest that you TRY WEP encryption, if you"re currently using unsecured wifi. Specifically WEP because it tends to have the best success rate with PSP connections--again, this is just my experience. WPA has worked for me, but WEP tends to work more smoothly. Additionally, as a troubleshooting step, you may want to try "b-only" mode, if your router has it. I do not recommend staying in this mode, but some devices use mixed mode in an imperfect manner, and it can cause issues with older b-wireless devices.
See more: Measurement Standards: Why Are Standards Of Measurement Necessary In Science?
The PSP"s networking is pretty flawed, to be quite honest. There are a lot of (disappointing) shortcomings, in my opinion, but there is no real reason why your setup SHOULDN"T work, as is.