我是hadoop的新手，正在尝试在Windows7上运行它。每当我尝试运行hadoop bash脚本时，都会出现以下错误：

'-Xmx32m' is not recognized as an internal or external command,
operable program or batch file.
Usage: hadoop [--config confdir] COMMAND
where COMMAND is one of:
  fs                   run a generic filesystem user client
  version              print the version
  jar <jar>            run a jar file
  checknative [-a|-h]  check native hadoop and compression libraries availability
  distcp <srcurl> <desturl> copy file or directories recursively
  archive -archiveName NAME -p <parent path> <src>* <dest> create a hadoop archive
  classpath            prints the class path needed to get the
                       Hadoop jar and the required libraries
  credential           interact with credential providers
  key                  manage keys via the KeyProvider
  daemonlog            get/set the log level for each daemon
 or
  CLASSNAME            run the class named CLASSNAME

Most commands print help when invoked w/o parameters.

另外，当我运行hdfs命令时，会出现以下错误：

-Xms1000m is not recognized as in internal or external command.

当我尝试传递-xmx和-xms参数时，得到以下消息：

Error occurred during initialization of VM
Could not reserve enough space for object heap

有人能帮我吗？