rpl97下的su0349错误

请指教:
我在安装RPL的PWIN97无盘站时,在DOS无盘站上第一次安装WIN95时
f:\setup /t:e:/temp
当安装向导复制文件到100%时就报告:
Error SU0349
A mismatched SETUPX.DLL is loaded.Setup
cannot continue.Quit all Windows and
MS-DOS-based programs,and then try again.Or
quit Windows and then run Setup from MS-DOS.
下面是确定。
谢谢!