It looks that I asked to much question today, then my account has been locked. Then, I created an other account to ask a question (I saw that it was not forbidden), and the other new account is locked since it looks to be connected with this one. How can it be possible ? Is there a way to fix the other account, who would allow me to ask an other question ?
Well, the only particular rule to abide by if you have multiple accounts is:
Don't use multiple accounts to do anything you couldn't do on a single account.
A particular application of this rule is that you should not avoid any rate limits using two accounts - so, if one account is prevented from asking questions, circumventing this with another account is not permissible.