How to upgrade from flashaccess/getServerVersion/v3 to flashaccess/getServerVersion/v4

Hi Team,

When i am playing the DRM enabled video through adobe flash player it is not playing in some PC i am observing continuous buffering. I observed in developers log that when request is going through  .com/flashaccess/getServerVersion/v3  it is not playing on PC.

But in some PC DRM enabled video is playing fine and i observed that request is from com/flashaccess/getServerVersion/v4 .

Could you please suggest how to upgrade my request to com/flashaccess/getServerVersion/v4 from .com/flashaccess/getServerVersion/v3 .

Please suggest asap

Regards,

Amit