mentor 转 PADS的问题

我通过mentor 的File\\Export\\ASCII 将PCB文件导出如下文件：
Padstack.hkp
Cell.hkp
PDB.hkp
JobPrefs.hkp
NetClass.hkp
NetProps.hkp
Layout.hkp
然后用PADS9.5的ppcb2hkp.exe进行转换得到的PCB 是空的（只有90多Kb)。log文件提示如下：
Expedition to PADS Layout Design and Libraries Translator (Version 9.5) 03/25/14 14:28:13
Copyright (c) 2012 Mentor Graphics Corp. - All rights reserved
------------------------------------------------------------
Input folder: C:\\Documents and Settings\\Administrator\\桌面\\aaa\\
Output folder: C:\\Documents and Settings\\Administrator\\桌面\\
Output file: C:\\Documents and Settings\\Administrator\\桌面\\design_1395728893.pcb
[I] Loading...
[I] Translating Expedition design files from \'C:\\Documents and Settings\\Administrator\\桌面\\aaa\\\' to PADS Layout design file
[W] HKP file \'C:\\Documents and Settings\\Administrator\\桌面\\aaa\\Padstack.hkp\' is not encrypted.
[W] HKP file \'C:\\Documents and Settings\\Administrator\\桌面\\aaa\\Cell.hkp\' is not encrypted.
[W] HKP file \'C:\\Documents and Settings\\Administrator\\桌面\\aaa\\PDB.hkp\' is not encrypted.
[W] HKP file \'C:\\Documents and Settings\\Administrator\\桌面\\aaa\\JobPrefs.hkp\' is not encrypted.
[W] HKP file \'C:\\Documents and Settings\\Administrator\\桌面\\aaa\\NetClass.hkp\' is not encrypted.
[W] HKP file \'C:\\Documents and Settings\\Administrator\\桌面\\aaa\\NetProps.hkp\' is not encrypted.
[W] HKP file \'C:\\Documents and Settings\\Administrator\\桌面\\aaa\\Layout.hkp\' is not encrypted.
[I] Reading Pad Stacks...
[I] Completed
希望各位大侠给予帮助，在这我先谢谢了！