Root Huawei ascend p7 deletes automatically my root

[Cas190]

Hello me again,

Recently I have Rooted my Huawei Ascend P7 I had a lot of fun with it.
But what the problem my root just last for a couple of days and then it deletes it?
I use EmotionUI2.3 (P7-L10V100R001C00B126) Android version 4.4.2 Kitkat

Have anyone a solution for it?

Sincerely,

Cas190