compiling on windows vc++ bison error ?

Hi, I'm having difficulty compiling the PHP source code on Win2K with VC++ 6.0. I've followed the instructions on the website, but I keep getting errors compiling the ZendTS project. It appears that bison is not actually generating the zend_language_parser.{h,c} at all. However, from the Cygwin command line, it appears to work fine: $ bison --output=zend_language_parser.c -v -d -p zend zend_language_parser.y $ ls -lart | tail -4 drwxr-xr-x 6 Administ None 36864 Nov 6 09:57 . -rw-rw-rw- 1 Administ None 6090 Nov 6 10:00 zend_ini_parser.output drwxr-xr-x 2 Administ None 16384 Nov 6 10:00 Debug_TS -rw-rw-rw- 1 Administ None 688770 Nov 6 10:02 zend_language_parser.output $ So bison command executes without error, but it fails to generate the appropriate .c and .h files. I am using bison v 1.75 (the latest from cygwin). Has anyone seen an error like this? dave