Radio stutters in Fallout 3 help me! (Fallout 3)

1) Go to "Start" -> "All Programs";
2) Go to the FFDShow codec folder and run "Audio decoder configuration";
3) In the left pane, click on "Info & debug." This is the second line on the list.
On the right pane, closer to the bottom, find the line with the checkbox "Don't use ffdshow in:"
Check the box for the text below it (it will be highlighted when you check this line), add "fallout3.exe" (do not enter quotes). If the field already contains entries, type a semicolon (;) after them, followed by fallout3.exe. DO NOT use spaces as FFDShow will treat them as part of the filename. The correct entry looks like "explorer.exe; fallout3.exe" (without the quotes). -
Doesn't work.

Changing the sound of the radio, it no longer stutters, as soon as Eden or Tridognite talked, the music plays and it stutters.
Help pliz.