[otrs] Too many connections error

Hi there, I'm using OTRS 2.2.5 with MySQL 4. I'm recently getting this below error. Does anybody know how to solve it? Thanks DBI connect('database=otrs;host=localhost;','otrs',...) failed: Too many connections at /opt/otrs/Kernel/System/DB.pm line 197 ERROR: OTRS-GenericAgent-10 Perl: 5.8.6 OS: linux Time: Sat Mar 29 19:40:02 2008 Message: Too many connections Traceback (19114): Module: Kernel::System::DB::new (v1.75) Line: 174 Module: /opt/otrs/bin/GenericAgent.pl (v1.41) Line: 78 Got no DBObject! at /opt/otrs/Kernel/System/PID.pm line 69, <PRODUCT> line 4.