I cannot access Facebook chat through Nimbuzz in mobile. It’s showing ‘Your account is temporarily unavailable. Regain access from your computer.’ But after logging in from PC, also it’s not accessing Facebook chat.
Facebook login problem in Numbuzz how to solve it?
log in to your account with a computer and check if your account blocked or not
may be to remove Facebook from nimbuzz and reconnect Facebook in nimbuzz
Visit your profile and under your apps section which can be accessed by going to Applications settings,see the permissions of Nimbuzz app.Also,try to remove the app from your profile and then use your phone to again reset your Facebook profile in Nimbuzz app(i.e. remove every bits of information from Nimbuzz app about Facebook and then add it later).
Can you access FB Chat on your PC too? If it doesn't, check your FB settings. Also, is this your first time to try FB chat on your phone? You have to check if your phone can work with programs like you're using.
You can get some help by using this email: firstname.lastname@example.org. That will connect you with the right people and hopefully resolve your issue. You can also find some information on this site to be helpful: http://india.blog.nimbuzz.com/2011/04/08/how-to-connect-facebook-chat-on-nimbuzz/