Hello ManzoA. I understand Beats Audio is not working on Windows 8.1. Microsoft has actually stated that IDT Audio (Beats Audio's source) is not compatible on Windows 8.1, and you can locate this information here: http://www.microsoft.com/en-us/windows/compatibility/CompatCenter/ProductViewerWithDefaultFilters?TempOsid=Windows%208.1&Locale=en-us&Architecture=X64&TextSearch=idt%2Bpc%2Baudio&Type=Both&CurrentPage=0&TotalPages=1&ShowCriteria=0&SortCriteria=Relevance&Compatibility=Unknown&LastRequested=14
All I can advise is updating all of your drivers and performing your Windows Updates, and hope for the best.
Mario