DAM Frontend

when I try to upload a file (tested with pdf and jpg) after clicking the upload button the page reloads, showing the initial upload form again and additionally an html error outside of the page content:
|Unknown column 'file_extension' in 'field list'|
The file however will be uploaded into the filesystem but there is no way to set categories manually in the FE. Inspecting the file in the BE confirms, that there is no categorie added. Also the other options like title, copyright, author and description ar NOT set.
I have configured the plugin for the upload form-view and selected one dam categorie. I also checked the box "use this as default category" -> no help!
I use Typo3 4.2.6, dam 1.1.1, dam_frontend 0.2.1, MySQL 4.1.22

The following might not have to do anything with my description above, but to give as much informations as I can I poste it here as well:
When I click in the EM on the extension it shows that an update of fields is needed:
ALTER TABLE tx_dam CHANGE tx_damfrontend_feuser_upload tx_damfrontend_feuser_upload int(11);
Current value: int(11) default ''
But clicking the 'make updates' button does not change anything. After reload the message still appears. This behaviour is the same in the DATABASE->COMPARE section of the Install Tool.

This all looks to me like a bug. Have you tested dam_frontend also with newer dam versions than 1.0.x? Do I probably miss some configuration? Other parts (like filelist) work well in my installation.