Files wint download correctly

hey, on some servers, the files wont download correctly, so ill hvae to keep redownloading them, but they still wont work, for example: on perp, it only downloaded 300 out of the 1449 files i needed to download. So when i want to join, i need to download 1000 files, and even when thier done, i cant play because they didnt download correctly, so everything is an error. Same with zombie outrage, i have to download 15 files, but non of them download correctly. please help!!! ;D