dropped frames with H264

[carmenm]

TV-Server Version: 1.0.0 RC2
MediaPortal Version: 1.0.0 RC2
MediaPortal Skin: Monochrome
Windows Version: xp sp2
CPU Type: Athlon 64
HDD:
Memory:
Motherboard:
Video Card: 8800GT
Video Card Driver: 175.16
Sound Card:
Sound Card AC3:
Sound Card Driver:
1. TV Card:
1. TV Card Type:
1. TV Card Driver:
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec:
MPEG2 Audio Codec:
h.264 Video Codec: FFDSHOW tryouts
Satelite/CableTV Provider:
HTPC Case:
Cooling:
Power Supply:
Remote:
TV: panasonic PAE900 projector
TV - HTPC Connection: DVI to HDMI through ampli

Hi everyone,

I have a recent problem with H264 720p movies. I have dropped frames about every 5 to 10 seconds while watching them inside MP.
I use FFDSHOW only but i also tried with coreAVC and it s the same.
The real problem is that it doesnt happen using Zoom Player and the exact same codecs.
So it must have something to do with MP. I didnt have this problem before and i cant really tell when it happened. One thing for sure is that it already happened in one or two svn versions before RC2.

Can someone help me find the source of the problem so that i can solve it?

Thanks a lot