XBMC unresponsive after resume from sleep

Hello,

My XBMC system will 9 out of 10 times become unresponsive after resuming from sleep. I'll have to kill the XBMC process using task manager to resume using the system. Is there anything I can do to help diagnose the problem? I am using XBMC 12.1 (Mar 17, 2013) on Windows7 64 using MDD A8-3870 with AMD Radeon HD 6550D

Thanks!