At the very beginning the DRS works well,recently I install some mod(don't if this is the reason why I can't open DRS),the DRS now is not available... I remember that when you get into a DRS zone,an alert will show at the left bottom cornerRS available now,then you an press a button and open it.But this available messege never show up now,and what ever I press the DRS button,there's always DRS not available now...Does any body know why?Please tell me!!Help me work this out!!Really thanks. I found that there's a thread talking about this but not work it out.So help!