You must be within 10 + 10% of the other player's level and the summoner must be human to summon. if you leave a summoning sign (which makes you summon-able) you can't summon people into your game world (this is to prevent being summoned into a game world after while you summon someone else). Example: If you are soul level 100 you can co-op with players on your server whose soul level is between 80 and 120.
1st play another game if it plays fine then Clean the Noire Disc, turn off the system and turn it back on then try to install it. if it will not install contact customer service tell them you have a bad disc, they will send you another one.