Question: Firewall settings

I have a problem with maple11 running on my laptop:Maple Faq tells me :You should configure your firewall to grant full permissions to the following Maple files: ..\Maple 10\jre\bin\maple.exe ..\Maple 10\bin.win\mserver.exe ..\Maple 10\bin.win\cwmaple.exe ..\Maple 10\bin.win\cmaple.exe But I don't know how to do that:I have Netgear DG834g router,I follow the instructions there to go to Firewall rules, I click on add service and i am lost(nb I am awful with computers).Then I go to services>add custom service and again I don't know what to do...Basically what am i supposed to do??Is a service a correspondence files--ports i create?(i don't even know what a port is..)Although it would be nice to know the theory,if you understood what i must do and guide me step by step with no explanations about what a port or whatever is ,it would be greatly appreciated-I just want it to work.Sorry if this is a horrible posed question it's my first time writing in any kind of forum ;thanks for any help
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