Native code=can't connect to mysql server through soket'/var/lib/mysql/mysql.soket' MS://asteriskuser:amp109@localhost/asterisk

I have been using asterisk successfully with Free pbx for several months now. A few days ago, I tried to connect to the freepbx webpage on my server and I get:
[native code=can’t connect to mysql server through soket’/var/lib/mysql/mysql.soket’(111)] ****mysql://asteriskuser:amp109@localhost/asterisk
can some one help me??
thanks