[ns] error in .bashrc

[mohamed Sabry]

dear, all
these errors appear to me when
[root at localhost sabry]# ns example1.tcl
ns: error while loading shared libraries: libotcl.so: cannot open shared object file: No such file or directory
[root at localhost sabry]# tcl example1.tcl
bash: tcl: command not found

and this is a copy of .bashrc

#.bashrc

# Add personal customisation commands after this line
export LD_LIBRARY_PATH=$PATH:/usr/lib
export TCL_LIBRARY=$PATH:/usr/local/lib/tcl8.4
export TK_LIBRARY=$PATH:/usr/local/lib/tk8.4

# User specific aliases and functions

alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'

# Source global definitions
if [ -f /etc/bashrc ]; then
        . /etc/bashrc
fi


i want to no the error
why it is not run?
how can i start
i configure, make, and make install
to Tcl-8.4.14 ,  Tk-8.4.14 , otcl , TclCl , ns-2.31 , and nam-1.13
i use fedora 8

thanks
M.sabry
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