Sleepless after WebEPG (1 Viewer)

[rsbrux]

TV-Server Version: n/a (TVE2)
MediaPortal Version: 0.2.3.0 SVN18395
MediaPortal Skin: BlueTwo wide
Windows Version: XP MCE RU2
CPU Type: Intel Pentium 4 @3 GHz
HDD: Samsung HD501LJ 500GB
Memory: 3 GB DDR 400 DIMM
Motherboard: FIC P4M-915GD1-LF
Motherboard Chipset: Intel i915G / iCH6
Motherboard Bios: Phoenix 6.00 PG 10 May 2006
Video Card: Nvidia GeForce 6600
Video Card Driver: 9.1.4.7
Sound Card: Realtek High Def. Audio
Sound Card AC3: no AC3
Sound Card Driver: 5.10.0.5178
1. TV Card: Hauppauge HVR-1300 MCE
1. TV Card Type: hybrid (only analog section in use)
1. TV Card Driver: 2.119.25023.0
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: dScaler
MPEG2 Audio Codec: dScaler
Satelite/CableTV Provider: Telezug (WWZ) Switzerland
HTPC Case: FSC Scaleo E (FIC Spectra)
Cooling: OEM
Power Supply: OEM
Remote: PDAwin.com TVRC 5.5
TV: InFocus TD40
TV - HTPC Connection: DVI

My HTPC doesn't go back to sleep after waking up to retrieve EPG using WebEPG.
In normal use, going to sleep (hibernate) works fine (automatically).
Logs are attached.
TIA for any help.