game wifi hosting

I've experienced this with a few games but only decided to try to do something about it now.
You see, when I play certain games that have wifi, when I try to connect online as a host, my game hangs and the NDS needs to be reset, but when I try to be the client, its working fine. Games I could remember would be one of those yugioh games, sonic rush and the megaman starforce games. There were more but I kind of forgot already. Anyway, I'm hoping someone here could help me. I figure it must be something like the arm7 fix but I need to replace a different one, but that still is just a theory. Anyone know a way? I am using the NinjaDS firmware 1.05 which is the latest they have got. Thank you!!!

ahhh. nevermind... i seem to have stumbled unto a fix. maybe... thanks to those who gave it some thought!

I would have said a likely culprit is the speed of the storage media holding the rom.