Use the IMRP client to log in
Download it here - https://sa-mp.im/server/download
Make sure you entered the correct password and username. You need to put an underscore between your firstname and lastname, like this - ''Ina_Zehra"
Anyway if that doesn't work. Try to change your password at UCP and log in with new password.
If that doesn't help, I recommend you to contact a board administrator.