Cant sign into voki classroom

I tried to login my classroom to grade voki homework and I received...
Database error:(10.200.131.13,root,$password) failed
MySQL Error: 0
includes/oddlib/class.DB_MySQL.inc:session halted
Please advise.... students emailing me they can not complete assignment
Thanks.
Debra Glover
Episcopal Day School
Augusta, Ga
un   dglover@edsaugusta.com
pw  voki123

please reply to dglover@edsaugusta.com