why are recording screenshots not always showing? (1 Viewer)

[kkendall]

TV-Server Version:
MediaPortal Version: MP/TVserver 1.02
MediaPortal Skin: Blue3 Wide
Windows Version: Vista SP1
CPU Type: Intel Core 2 Duo E6750 775 1333FSB 2.66Ghz 4MB
HDD: 2x Samsung spinpoint 500GB
Memory: 2x Kingston DDR2 ValueRAM 1GB 667 CL5.0
Motherboard: Asus P5K
Video Card: NVIDIA 9600
Video Card Driver:
Sound Card:
Sound Card AC3: AC3 and DTS: S/PDIF
Sound Card Driver: latest
1. TV Card: FloppyDTV
1. TV Card Type: DVB-C
1. TV Card Driver: latest
2. TV Card: Hauppauge PVR500
2. TV Card Type: analog
2. TV Card Driver: latest
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: PowerDVD 8
MPEG2 Audio Codec:
h.264 Video Codec: PowerDVD 8
Satelite/CableTV Provider: CAIWAY
HTPC Case: Silverstone LC17b
Cooling: fans
Power Supply: ANTEC
Remote: Microsoft MCE 2005 remote
TV: Panasonic TH-42PZ85
TV - HTPC Connection: DVI-HDMI

There is a great new feature that shows 4 frames of a recording so you can see some screenshots.
...but not all recordings have this...
Can I do something about this? So that it makes MP always show these 4 screenshots?