You need to get MPIO installed and working properly. Review the MPIO section of the best practice guide for more info
https://h20195.www2.hpe.com/v2/GetDocument.aspx?docname=4AA4-6892ENW
I believe you are just using the native Windows MPIO so shouldn't be any HPE specific stuff to download. This link for Windows 2008 may help you to enable MPIO; I think the steps are the same for Windows 2012.