Cannot open EndNote X1 file (Mac) in Endnote X1 (windows XP)

When I try to open an Endnote X1 file created on a Mac on my PC (Windows XP) with Endnote X1 it returns the following errors:
This library appears to be damaged. Please verify that no other has this library simultaneously with write access. If this error persists after restarting EndNote, please repair the library using the Recover Library command on the Toolsmenu.
you do not have access privileges required to complete that operation
It works quite well from PC to Mac.

Using the Recovering Tool does not help.

What can I do?