Open Source Document Management System | OpenKM

Hello, after successfully running a test installation of OpenKM I now have some problems with the live one.
Whenever I try to upload a file bigger than approx 1mb i get the following error when using the uploader: "IOEception: Request Entity Too LargeXXXXXXX" where X is some number. Trying the same using the import function also fails, but with no error message.

Any idea where the size limit might be? The OpenKM max filesize is set to 0, as per default.
The only change between the test and the live installation is that I connect to the live install using apace on another server, so apache might be a likely suspect?

Are you connecting across tomcat directly port 8080/OpenKM ?
Are you uploading the file from OpenKM user interface ?
If you set the max.file.size=0 that means is unlimited, has no sense this error.