[Koha] problem with koha Mysql connect.

Dear Vimal, Myself Rekha saraswat from CDAC, Noida. I m using BOSS Linux(Debian). i have installed idzebra2.0 ,Net-Zoom package, YAZ3.0.38 Now the error is that can't connect to local mysql server through the socket var/run/mysqld/mysqld.sock. at the same time when i m trying to rebuild zebra it is showing can't find EXPLAIN schema. this problem is only with catalog search. rest of the things are working fine. kindly help me, if you can understand my problem. Regards Rekha