help with r4 sdhc

can anybody help me just got new r4 sdhc card, but a lot of games freeze on about 80% on the loading screen, and some dont work at all

The fixes vary depending on the game.The common issues thread recommends updating your firmware, and possibly using the Arm7 method of patching.
https://www.romulation.org/forum/index.php?topic=1462.0There is also some games that feature anti-piracy, a small list, and fixes, are available here.
https://www.romulation.org/forum/index.php?topic=29845.0

thanks for your reply, this might sound a bit stupid but where do you have put the patches? do you have to put them in a folder or just put them straight on sd card.

The patches, if they exist, are applied to the rom before you put it on your card.