Audio Problems during Ram Preview

Hello
I'm having a unique issue with my audio playback. Video playback works fine, but when I ram preview or audio preview it makes my computer stall for 10 - 20 secconds, then plays. the audio ether sped up, or slowed down (different each time). Once this happens once, I can then ram preview this area again, and it works perfectly, untill I ether go to another track, composition, or program, at which point the problems starts all over again. Anyone have any ideas?
I'm using a mac tower 8-core 2008, just recently put in an intel SSD drive for OSX Mavericks. in 14GB ram.
The audio is a wave file.
Thanks for the help!
Ian

Hi Szalam and Martlomiej, thanks for the responce.
Heres the wave file that Im using
However I feel like its not the Wave file at fault, because the issue also occurs on myfootage audio which are AACs, these are their specs
its having trouble reading the audio files for some reason. Stange.
Let me know if there are any other ideas.
Thanks for the help!
Ian

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