files wont copy to r4

hello, i recently downloaded a game from this site. i got trauma center and apollo justice:ace attorney. when i draged from the IZ arc into the r4 files, it says the game is corrupt.i have an R4i. and my operating system is windows vista. help anyone?

Probably got a corrupted download. Download it again, and use a Download manager like FlashGet to help with corruption problems.

ive tried that. the same thing comes out. i even tried switching servers :S. i also used winzip. same thing

What's IZ Arc?All the DS games are compressed with RAR. You have to use WinRAR to uncompress them, not Winzip.

normally i dont use it anyways but a lot of the times i use IZ Arc. IZ arc is like a RAR uncompresser. Every other time idownload a ROM, its ok but now its corrupt :S

Is your adapter on Lock? Because that happened to me before and I couldn't copy/manage any data on it

Use Winrar then.