"Can't create directdraw surface!" or picture trem

[hardsum]

When i open some *.avi coded with X.264, bsplayer is warning "Can't create directdraw surface!" and then file open failed. But if MPC or WMP, things does OK.
--BSPlayer Pro 1.37 build 826, FX5700LE with v66.93 drivers, rendering mode "default", decoder CoreCodec for 264. This setting is also OK for most media files i have.

If i change the rendering mode setting to "Overlay mixer", the X.264 coded file is open perfectly. But there is picture trembling(a little but obvious) when i open some mpg files, e.g. "C.More.HD.Demo.mpg" . Moonlight decoder.

So the question is: Do i always necessary to change the rendering mode setting according to diverse media files? Can BSPlayer suggest a universal rendering mode setting for the users or to fix something bug??

BTW, the fast decoder to H.264/X.264 that i have ever met is "CoreCodec AVC DirectShow Video Decoder", faster than ffshow.

Bless you understanding my English. Thanks!