skype doesn't receive calls (stock+gapps)

hi everyone.
i'm using HDX 8.9 with stock firmware(14.4.5.5) with kingroot, safestrap 4.01 and installed gapps. everything is great, but skype don't want to receive calls. i tried to install skype from amazon store, but it doesn't work with installed gapps. i googled my problem but find no solution.
pls help and sorry for my english

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