Recently, I had a problem in New Londo ruins summon but that was fixed by a quick look up on the wiki regarding the draining of water. I now seem to be having the same problem in OTHER areas of the game.
I was able to summon my friend all night last night until I got to the 3rd fire in Anor Londo. I opened the shortcut on the same run he has died in. Then BAM.....couldn't summon him again. I know about the SL summon range and we've made sure to stay within it. Now it appears that this problem is affecting all of my characters in different stages of the game.
I can't imagine this is a router issue as NOTHING has changed. I even power cycled it and the cable modem to be sure. It can't be a problem like the New Londo Ruins summoning issue because all of my characters are at varying SLs and areas of the game. It's not xbox live because the people I am trying to summon are getting invaded and summoned constantly (again, they are in my SL range).
Has anyone had this happen? Please help.