My summon can't pass the fog

[Pottercito_]

I summon a guy before the battle against the gargoyles, I tried 1000 times but my summon couldn't pass, it says that "he retorned to his world". Maybe my explanation is that in that area there is a dark invader and I did not kill him because it is very hard, the "Bell Keeper" something like that is a dwarf, maybe that's why my summom can not enter the fog, I killed the gargoyles though, but will it happen with future summons? With Lucatiel? Pleaseee...

[SairenOne]

never had that problem because i never saw a single summon sign except for one. i thought ds2 online was dead...

[Pottercito_]

9 minutes ago, SairenOne said:

never had that problem because i never saw a single summon sign except for one. i thought ds2 online was dead...

I refer to the offline summons but doesn't matter it did no happen again in the other battles.

[Knightmare_1985]

That npc summon in the bell tower area is strictly for that area (you’ll notice you can’t progress nor return to the previous room with him present), there’s a crazy high chance you’ll get invaded in the small area there, on new game plus I was invaded by three people at once, that summon is super helpful