272 ms First Byte Time

Hello,
the blank test page on server i manage has 272 ms First Byte Time which is too high. WebPagetest.org advices "213 ms Target First Byte Time"
The full page speed test: http://www.webpagetest.org/result/140504_7G_KEX/
Please can anyone help me to discover the cause of this high first byte time? here is serv. inf_o
server dont appears to be overloaded. i will try to do any linux command which…
272 ms First Byte Time

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