HELP! errcode=-81 on R4i SDHC Upgradev1.4

hey there!I've got quite a few roms which don't want to load.
When this happens the erccode=-81 message comes out.Hope someone can shed some light on my situation. Thanks in advance :DIf it's any help here are my hardware specs:
DSi, r4i SDHC Upgrade v1.4, 2gb Kingston SD card..

I've had the same Problem. I copied like 100 Games at the same time to my Card, and when I try to start the ones which have a bigger filesize don't work. My solution: Delete all Games which aren't working, eject your Card, an now copy one game, eject, copy, eject. It worked for me, weird....
Maybe you should try to use another dump, format your Card etc...

so basically I should try putting roms into my card one by one with ejections in-between each transfer?
worth a try.. at this point, anything is @_@

Try it with one Game, if it works, most others will. (From my experiences)

tried it with a few games already and it worked :)
many thanks GhanaChris! :D

i have got a r4i sdhc and it says on the back of the red card box it came in that it supports a 4gb -32gb micro sd ,all my game roms apart from ones with anti pirating files in them that i havent patched yet work fine im using a 8gb sandisk micro sd though so maybe it will be worth trying a bigger capacity msd as the 2gb may not be compatible with all the game roms ?i am no expert though im just summising that it might be the problem,good luck 8)

I've had 2x 2GB MicroSD Cards and now 1x 8GB MicroSDHC. There's actually no difference with the compability of games.

Whoa I've never tried that but sometimes I get that message too... And I'm not even using R4i haha I'm using R4SDHC AHHH!!!! R4 sucks now... I regret getting it.