XmlTv dont import tvguide (1 Viewer)

[Tooms73]

TV-Server Version: 1.02
MediaPortal Version: 1.02
MediaPortal Skin:
Windows Version:
CPU Type:
HDD:
Memory:
Motherboard:
Video Card:
Video Card Driver:
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:
Satelite/CableTV Provider:
HTPC Case:
Cooling:
Power Supply:
Remote:
TV:
TV - HTPC Connection:

My tvguide has stopped updating, it works fine for a week or so, and then it just stops working. It helps when i reinstall, but only for a week.
Ive tried with both EPG service and Dr EPG, i get this error in xmltv:

XML tv import error loading C:\guide\TvGuide.xml err:The given key was not present in the dictionary.
at System.ThrowHelper.ThrowKeyNotFoundException()
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at TvEngine.XMLTVImport.Import(String fileName, Boolean showProgress)

I do have the tvguide.dtd in the same folder as tvguide.xml.
Can anyone see whats wrong with the setup??

i really hope that you guys can help me, because it really borthers me alot..

,Thomas