Setting up sharding architecture based on "simple initial sharding architecture document. when trying to connect mongos to the config server i get the following error. brought up a second config server and got the same message. thoughts?

[mongodb@my07apl01 ~]$ ./mongodb-linux-x86_64-2.0.2/bin/mongos --configdb my07or l03:27019
Tue Jan 24 15:32:56 ./mongodb-linux-x86_64-2.0.2/bin/mongos db version v2.0.2, p dfile version 4.5 starting (--help for usage)
Tue Jan 24 15:32:56 git version: 514b122d308928517f5841888ceaa4246a7f18e3
Tue Jan 24 15:32:56 build info: Linux bs-linux64.10gen.cc 2.6.21.7-2.ec2.v1.2.fc 8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_41
Tue Jan 24 15:32:56 [mongosMain] ERROR: listen(): bind() failed errno:98 Address already in use for socket: 0.0.0.0:27017
Tue Jan 24 15:32:56 [mongosMain] ERROR: addr already in use
Tue Jan 24 15:32:56 [mongosMain] dbexit: rc:0
[mongodb@my07apl01 ~]$