Issue with Asio

Hi, few days ago i must reinstall my system, because i had some viruses.
Before Rekordbox works great.
Okay, i have new system, i installed rekordbox and drivers, and when i want choose DDJ-RB ASIO in Audio, i see "error while opening".
Someone knows why i have this problem?
Before i have any problem, but now.. :/
Sorry about my english, waiting for any answers, any help, this is important for me, because soon i have party, and it must works. :(