I recently applied an unlock pattern to my Pulse, but whilst on a night out, I got the pattern wrong one too many times. Because of this it asked me to sign in using my email address and password. I have tried on multiple occasions to sign in, in this manner. However my Pulse is saying that the email address or password is wrong, and I'm pretty sure it's not as I've tried many variations. Has anyone else experienced this issue? And do you have any advice?