[ns] ns2 2.33 recompile and the ns command can not execute

[=?GB2312?B?wfXLpw==?=]

HI everyone.

I recompile ns2 2.33 at cygwin.

I use make at directory ns-2,33. However after compile, I can not use ns at
any directory except ns-2.33.

In any directory when I input ns, it will give the error:
$ ns
Error: Cannot open shared library: No such file or directory

Any one can give some advice? Thank you!