DVB-T Channel change very long when timeshifting on

[amnw14545]

Area: Media Portal Program
MediaPortal Version: 0.2.0.0 RC2 (2006-03-18)
MediaPortal Skin: BlueTwo
Windows Version: Windows XP (SP2)
.NET CLR Version: 2.0.50727
DirectX Version: 4.09.00.0904 (9.0c)
Audio Codec: NVIDIA Audio Decoder
Video Codec: NVIDIA Video Decoder
CPU Type: AMD Athlon 64 3500+
Memory: 1 GB
Motherboard: GA-K8NF9 Ultra (Gigabyte Technology Co., Ltd.)
TV Card Model: Terratec 2400i DT
TV Card Type: DVB
TV Card Driver: 1.0.3.255
Video Card Model: Nvidia Geforce 6600 (256 MB)
Video Card Driver: 8.1.9.8
Video Card Resolution: 1360x768
Video Render Type: VMR9
Audio Card Model: Realtek AC'97 Audio
Audio Card Driver: 5.10.0.5770

Shown by Log3
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Start up MP.
Enter My TV; TV comes on and Timeshifting is on.
Takes a while (around 10 seconds for TV to appear).
Go into full screen.
Try using remote to change channels (nothing happens!!)
Right click and use channel menu to change channels.
Takes anywhere between 8 and 15 seconds to channel change.
** Channel change should not be that slow?