LTC Mining half my shares are stale

[Alizel]

hey guys. im running reaper on a few 5870's with default settings no OC.

about 40-50% of my shares are stale. how can I improve this?

also on one of my other rigs. ive re-installed windows a few times including trying 12.8 and 13.1 drivers but cg miner and reaper crash. I got a bit farther with reaper on 12.8 but the error im getting is

Error creating open CL command queue

its win7x64

its odd because another rig that I just put together was no problem with a fresh win64 and 13.1 with a 5830

btw im on burnsides pool.

thanks guys.

[Alizel]

bump ftw?