705kbps/1411kbps samples problem

[opx]

my problem is that whenever i try to listen some 705kbps/1411kbps samples they won't play or i have to try like 30 times to listen the sample... in winamp/wmp, some samples work just fine but others doesnt, it's very annoying, in WMP it says that a codec is missing but it doesnt know what codec, im wondering why does it say that because when i play these files it only needs PCM/WAVE codec inbuilt in windows...
just in case i installed the klite codec pack with like 617861 codecs but it wasn´t any help

i'm using kXproject drivers with Creative SoundBlaster Live 5.1 and im positive that my computer can handle these samples (3,3ghz C2D, 2gb of ram)

[contra]

sometimes winamp wont read files less than a second long. try a audio editor like audacity perhaps ?