CPAC Installation with DOSBOX under Windows7 64 bit

[Kunio Yamada]

I have failed to install CPAC with DOSBOX under Windows7 64 bit.
The following message appear during installation from original
diskettes and have not continued.
----Error-------
The compressed files in this directory should be
decompressed. They cannot be used while they are
compressed.
------------------

Does anyone adviｓe to solve it?

Floppy disk is of CPAC F1021B/C and contains below

Disk 1/3
1994/08/29 09:03 391,665 APPS.ARJ
1994/05/04 16:53 59,686 DEARJ.EXE
1994/06/08 15:07 1,022 INSDISK.RI
1994/06/08 14:16 1,024 INSDSK_F.RI
1994/06/08 14:13 1,024 INSDSK_G.RI
1994/06/08 14:17 1,024 INSDSK_S.RI
1994/06/20 15:18 156,980 INSTALL.EXE
1994/06/30 15:50 29,528 INSTEXT.RI
1994/08/08 15:22 30,781 INSTXT_F.RI
1994/08/08 15:24 33,359 INSTXT_G.RI
1994/08/08 15:25 32,251 INSTXT_S.RI
1994/08/29 09:05 111,984 RES_FR.ARJ
1994/08/29 09:05 114,867 RES_GR.ARJ
1994/08/29 09:04 107,867 RES_SP.ARJ
1994/08/29 09:04 96,030 RES_US.ARJ