As you are running Windows 2008 R2, it is 64 bit. Are you running 1.0.4 agent? If yes, it is 32 bit, and it may cause some problem (although it shouldn't). In this case, could you please try to replace agent with x64 version (it will be agent version 1.1.0, but it is compatible with 1.0.x servers).
Best regards,
Victor
Best regards,
Victor