PS2 Pink Screen on SMB games

[Kito]

As the title says, every time I try to run a game over Ethernet (SMB) I get a pink screen.
I use a Mini-Router, the PS2 detects the games with no problem, but when I try to open one I get the pink screen.

I have a PS2 Slim
OPL 1.2

 

[1052]

@Kito, maybe your issue is related to this one or this one.