R help - Apr 2007 - Problem with Cygwin

Hi All ,
   I am trying to compile some c codes with R CMD SHLIB on Cygwin. But I got the
following error
   
   WARNING: ignoring environment value of R_HOME
   ERROR: R_HOME ('/home/Owner/r/R-2.0.1') not found

   I have set the environment variable R_HOME pointing to the current R
installation, but the R command
still looks in the old directory,   Could someone help me out here ?

Thanks a lot .