Buggs with the import of files

When we import several files, the Software bugg and the time of answer becomes very long, it is necessary the close and start several times.
When we import Word files, contents are falsified and we must manually modifie .
I think that the problem comes from the version of Confluenece which we use: 3.1 but according to providers of Confluence in france, the version of Internet Explorer that we use: 1.6 is not comptatible with the version 3.3 of Confluence