need help

I purchased r4 cards that are copies (unknowingly) for my young kids. Some games don't play at all (Browsers Inside Story), some games lock up and don't go past certain levels ( Winter Olympic games). Can anyone recommend a reliable card and possibly a source without violating website rules?
Thanks for your help.

Take a look here for some fixes specific to those games:
https://www.romulation.org/forum/index.php?topic=29845.0But if you want a new, better flashcart, then you can purchase an Acekard 2i.
http://www.realhotstuff.com/-c-125_102.html