Here is a guide to clear the two verisons of DGS that plauge ps3 owners.
There are two methods to clear DGS type 2, first I will go into the possible causes of the error. Sometimes if you log onto to your pc and the internet before connecting to cod4 this will cause DGS type 2. Type 2 is when you go to search for a game or accept an invite you get "Downloading Game Settings".
Right to clear Type 2
Method 1
1. Leave Call of Duty 4
2. Disconnect the power to your router, the ps3 should read "No Ethernet Cable Connected" this will flash ever 30 to 60seconds
3. Wait 1 whole mintue, then reconnect your router
4. The router will cycle then when all lights are soild, your ps3 will attempt to reconnect to psn, if not reconnect yourself
5. Load up Call of Duty 4
There is a chance the ps3 will lose all your internet connection details, like your nat type. After doing method one, go to your internet settings, scroll down to nat type, if it reads "failed" or has a dash, you need to re-preform your internet settings test. This will regive you a nat type.
Method 2 - if you dont want to redo the settings
1. Leave cod4
2. power off your ps3
3. disconnect your router and wait 1 min
4. reconnet your router and wait for all lights to go soild
5. power back up your ps3
6. reconnect to psn
7. re-load cod4
this will clear type 2 dgs
Type 1 DGS is a more serious error state, this when you connect to cod4 it will not go pass this. Sometimes this is caused by a serve side error and has nothing directly to do with you. But if you cannot connect repeatly, attempt to forward all the correct ports on your router. I don't know the details of doing this, but I am sure there are some good help guides on the offical ps3 forum or other sites or here.
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