[gokalp]

If it is 2 hours difference, it might be a time zone mismatch.

Assuming that you are using XP, double click the time on the task bar, which should open the "date and time properties". There are three tabs there, and the second should be "time zone". Does it match with your current time zone?
[in vista it should be similar, just more clicks to get to that screen]

In the PRS700, I did not see any time zone setting. But there might be in Sony software (in the form of "location" or something). I would also look check that to see if it matches.