web.de Freephone funz not

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I have freenet with me and my cousin have 1&1. Now I wanted to telephone free of charge over VOIP with my cousin, but since freenet does not have 1&1 with its IP phone partners in it, it does not go.
Whereupon I furnished web.de Freephone with me. I received my number and in my FBF furnished, as the second Internet call number. First is from freenet. If I look then whether the number is registered, then stands there also registered. But if I try mean cousin now to call, come back always that the participant is straight not there and is at a later time to call.
Do I have to load only Web cent, in order to telephone from VOIP to VOIP, thus free of charge?
Thanks

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No, free discussions go also without assets, but as you select its number?
Completely or only a certain part?
In addition there are not still problems between freenet and Web.de, surprises me thus!
Mach times an attempt, enters the user names (with web.de) as abbreviated dialing @web.de and tries it times so, evenly over the abbreviated dialing.
Otherwise make simple it for you and announce you with sipgate, then it functions also.
Greeting from Tom