and first of all i wanna say i am sure this problem may be asked before but i did not find any using Search exactly about this issue and i mixed up instead.
please ProgDVB help me.

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in brief :
1- both 4.56.1 the picture is clear and Normal but can not change channel.
2- both 5.14.7 the picture on Vista (Client) is not clear & slow mation but can change channels.
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more explain :
there is two PC.
1st Windows Server 2003 PC with Nvidia Geforce 5200.
2nd Windows Vista Ultimate Service Pack 1 on Laptop with ATI Mobility X1400.
DVB card is Skystar 2 TV PCI installed inside of PC Server 2003.
the progDVB version is : 4.56.1 with Elecard codec install companion and the lateset 5.14.7 version without it.
the problem is can not change channel on client (Vista Ultimate SP1) correctly...sometime it will change sometime not change.
all the Firewall is closed now.
the same version of ProgDVB is installed on both of PC and after scanning channels on server the channel data folder copy on client too.
whenever I install 4.56.1 on both of the them clear picture is OK but i can not change channel on the laptop over Wi-Fi or LAN. (sometime changing successful and sometime not i do not know why)
and whenever i uninstall this version and install 5.14.7 on both of them without any Elecard Codec companion by ProgDVB after copying channels data folder on client too i can change channels successfully but the problem is the picture on the Vista SP1 is not clear (it is yellow and very slow mation) while by this version on server 2003 everything is OK.
I wanna say .Net Framework 3.0 installed on both of them with latest Graphic card Drivers installed and updated.
after install i RUN register.bat file in the Filters folder to make certain everything is OK but now i am so unhappy and mixed up lack of using great ProgDVB.
please please please help me what should i do to solve those kind of problem?
why progDVB developers team does not install Elecard Codec by this new 5 versions so users did not have any problem like this due to incorrect codecs or something else?
I hope you help me what is the wrong ?
I wanna take a clear picture on Vista SP1 running ProgDVB 5.14.7 while changing without any problem like that clicking over TV name but nothing happened on 4.56.1
I will sell DVB card if this problem does not solve by ProgDVB team.

I need change the channels over Wi-Fi
at the moment I use 4.56.1 and during the day watching just 1 channel over wi-fi or LAN so i feel i am in a prison.