hey guys, whenever i go to play a song, after i select one osu crashes

System.NullReferenceException: Object reference not set to an instance of an object.
at #Wc.#df.#yF()
at #Wc.#df.#dw()
at #1c.#0c.#uV()
at #1c.#0c..ctor(#kf )
at #Id.#Hd.#tY()
at #Id.#Hd.Initialize()
at #FX.#ef.Initialize()
at #ae.#9d.Initialize()
at Microsoft.Xna.Framework.Game.GameComponentAdded(Object sender, GameComponentCollectionEventArgs e)
at Microsoft.Xna.Framework.GameComponentCollection.OnComponentAdded(GameComponentCollectionEventArgs eventArgs)
at Microsoft.Xna.Framework.GameComponentCollection.InsertItem(Int32 index, IGameComponent item)
at System.Collections.ObjectModel.Collection`1.Add(T item)
at #ee.#Re.#NC(Object , EventArgs )
at #ee.#Re.Update(GameTime )
at Microsoft.Xna.Framework.Game.Tick()
at Microsoft.Xna.Framework.Game.HostIdle(Object sender, EventArgs e)
at Microsoft.Xna.Framework.GameHost.OnIdle()
at Microsoft.Xna.Framework.WindowsGameHost.ApplicationIdle(Object sender, EventArgs e)
at System.Windows.Forms.Application.ThreadContext.System.Windows.Forms.UnsafeNativeMethods.IMsoComponent.FDoIdle(Int32 grfidlef)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at Microsoft.Xna.Framework.WindowsGameHost.Run()
at Microsoft.Xna.Framework.Game.Run()
at #ee.#de.#5z()
can anyone tell me whats wrong?

EDIT:opengl works but directx doesn't

EDIT:never mind i just restarted osu and everything worked fine again
plase note that i just repaired my windows vista so yea plaese ether lock this or delet it or ignore it