Problem with lcPanel ogin

Dear members of the Forum,

I'm a new member. I have registered just last weekand it's a big pleasure joining your community. Since one month, I'm facing a technical problem with my website. From time to time I open easily the cPanel. But sometime, I cannot get through. My cpanel it's opening when I have nothing important to do in the website. But when I have an urgent matter to do in, it refuse to open. i'm sure the username and password are correct because it the same thing I'm using since.

Please, help me to solve this problem.

thanking you in advance.

best greetings

Oneninemedia