Help wifi connection problem

[charbelb]

hey i have samsung galaxy ace my problem is i loose my connection randomly it says that im still connnected but i loose it and then i need to disconnect and connect i tried to put the privacy policy to never and download wifi keep alive apps and i even tried to restrore the factory setting but nothing worked if some one can help i will be so thankfull my connection can't stay alive but it's still giving me that im connected :/