I cannot open my email id
Many things can cause such problem
1) The id or password can be wrongly typed
2) the Caps lock may be on in case if you used lower case to create your password
Whatever is the case... try checking if any of the above mentioned is the issue... But if none seems to be the case, then u have to reset your password, if you are really sure of the ID.
For you to reset your password, u have to remember the secret questions you were asked when you were creating the account.
Then to proceed to reset your password, find where is written, Forgot your password? or similar statement and click. follow the steps and answer questions as required.
Best of lucks!