CORBY GT-B5310

Hello,
Sorry my english this was the only place i get some solutions for my corby and still not working

well my trouble is i can connect my corby to wifi but then i want to navigate or go to youtube trough the widget and my phone try to but then it suddenly reset that mean it turns off and automatically on like if i've just turned on

i tried the solutions off reset all the phone with the code and erasing all the internet settings and profiles but it don't work
i hope someone can help me
thanks beforehand