Problems with MeetMe functionality

I just installed Asterisk 1.6

OS Version:
Linux 2.6.18-164.11.1.el5 #1 SMP Wed Jan 20 07:32:21 EST 2010 x86_64 x86_64 x86_64 GNU/Linux

22:54:41 up 2:05, 2 users,
Load Average: 0.07, 0.02, 0.00

Asterisk Build:
Asterisk GUI-version : SVN–rexported

I get this error any time I try something that calls MeetMe. It fails when trying a Conference Bridge, Paging etc. Does anyone know the answer or maybe has experienced this problem?

== Using SIP RTP CoS mark 5 -- Executing [6300@DLPN_DialPlan1:1] MeetMe("SIP/6050-00000001", "6300,MsIx") in new stack == Parsing '/etc/asterisk/meetme.conf': == Found [Mar 11 22:22:17] WARNING[5094]: app_meetme.c:869 build_conf: Unable to open pseudo device == Spawn extension (DLPN_DialPlan1, 6300, 1) exited non-zero on 'SIP/6050-00000001' pbx*CLI>

You need to install DAHDI then:
/etc/init.d/dahdi star
modprobe dahdi