[ns] ns-allinone-2.29 Installation problem in cygwin

[Aravind Thimmapuram]

 am getting following error while installing ns-allinone-2.29 in cygwin.
> ./configure: line 7901: syntax error near unexpected token `('
> ./configure: line 7901: `  case `(ac_space=' '; set | grep ac_space)
2>&1` in'
tcl-8.4.11 configuration failed! Exiting.....


I tried searching the archives of this mailing list.....but i didnt find any
solution to this problem. Plz help me!!!

Aravind.