libtk8.4.so not found: ns-2 run-time error

[boz]

I installed all of the dependencies for ns-2 individually, which include tcl/tk 8.4 (I probably could have used the debs, but oh well), otcl, and tclcl. I checked out ns-2, nam-1, and xgraph anonymously from the CVS repository, and compiled ns-2 successfully. Then I type ./ns and get the run-time error:

./ns: error while loading shared libraries: libtk8.4.so: cannot open shared object file: No such file or directory
ldd reveals:

root@raziel:~/src/ns-2# ldd ns
linux-gate.so.1 => (0xb7fc5000)
libtk8.4.so => not found
libtcl8.4.so => /usr/local/lib/libtcl8.4.so (0xb7f06000)
libXext.so.6 => /usr/lib/libXext.so.6 (0xb7ef8000)
libX11.so.6 => /usr/lib/libX11.so.6 (0xb7e11000)
libnsl.so.1 => /lib/tls/i686/cmov/libnsl.so.1 (0xb7df9000)
libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0xb7df4000)
libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0xb7dcf000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb7cdc000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb7cd1000)
libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7b82000)
libXau.so.6 => /usr/lib/libXau.so.6 (0xb7b7f000)
libxcb-xlib.so.0 => /usr/lib/libxcb-xlib.so.0 (0xb7b7c000)
libxcb.so.1 => /usr/lib/libxcb.so.1 (0xb7b64000)
/lib/ld-linux.so.2 (0xb7fc6000)
libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0xb7b5f000)
And I've confirmed that the library is in the right place:

root@raziel:~/src/ns-2# ls /usr/local/lib/
libotcl.a libtclstub8.4.a python2.5 tk8.4
libtcl8.4.so libtk8.4.so tcl8.4 tkConfig.sh
libtclcl.a libtkstub8.4.a tclConfig.sh
Does anyone have any idea what's going on? I'm still pretty new to development tools and troubleshooting on Linux. Thanks in advance.

[boz]

Never mind. If I exit from root user, the executable links to the library just fine.