FMS installation problems

Hey Folks: I'm attempting to install FMS on a RHEL server. Upon installation, here's what I see:

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Installing Macromedia Flash Media Server files...
Configuring Macromedia Flash Media Server...
Adding "fms" service.
Setting default admin to "fms".
Setting autostart for "fms".
Server:fms command:stop
NPTL 2.3.4
Stopping Macromedia Flash Media Server (please check /var/log/messages)
fmsmaster: no process killed
Server has shutdown...
./shmrd: error while loading shared libraries: libnspr4.so: cannot open shared object file: No such file or directory

Admin server:fmsadmin command:stop
Stopping Macromedia Flash Media Admin Server (please check /var/log/messages)
fmsadmin: no process killed
Admin Server has shutdown...
./shmrd: error while loading shared libraries: libnspr4.so: cannot open shared object file: No such file or directory

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$ ps auxww | grep -i fms
root 5831 0.2 0.3 36560 3876 pts/1 Sl 11:13 0:00 ./fmsadmin -console -conf ./conf/Server.xml
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I cant appear to get the fms process itself to start.

Has anyone else seen this?

Thanks much.