[huser]

I was using Calibre ios reader plugin and Marvin XD plugin to sync books on my windows 7 Pc with my marvin reader on ipad2. But when I tried to update ios reader plugin, it returned an error with following details.

calibre, version 1.35.0
ERROR: Install Plugin Failed: A problem occurred while installing this plugin. This plugin will now be uninstalled. Please post the error message in details below into the forum thread for this plugin and restart Calibre.

Traceback (most recent call last):
File "site-packages\calibre\gui2\dialogs\plugin_updater.py", line 711, in _install_clicked
File "site-packages\calibre\customize\ui.py", line 379, in add_plugin
File "site-packages\calibre\customize\ui.py", line 539, in initialize_plugin
InvalidPlugin: Initialization of plugin Traceback (most recent call last):
File "site-packages\calibre\customize\ui.py", line 533, in initialize_plugin
File "calibre_plugins.ios_reader_apps.__init__", line 886, in initialize
File "calibre_plugins.ios_reader_apps.__init__", line 1175, in _get_connected_device_info
InitialConnectionError: Unable to connect to iDevice
failed with traceback:
Traceback (most recent call last):
File "site-packages\calibre\customize\ui.py", line 533, in initialize_plugin
File "calibre_plugins.ios_reader_apps.__init__", line 886, in initialize
File "calibre_plugins.ios_reader_apps.__init__", line 1175, in _get_connected_device_info
InitialConnectionError: Unable to connect to iDevice

Could u help me fix this problem?