filefront problems

[wizardmatt]

Hi all. First of all, kudos to all you nutters who love modding this game so much.
As a consequence of all these mods, I use FileFront frequently. My browser is Firefox, with FlashGot, FlashGet, and Free Download Manager plugged in.
Trouble is, with several files I've tried, neither DM has worked. What happens is that the file I am trying to download is renamed "X6". In FlashGet I use the "use Comment" option to rename the file, and it will then download ok. However, with some files, this does not work and the download doesnt even start, meaning I have to use Firefoxes default downloader.
I've checked the support centre knowledge base at filefront which suggests that one option to solve a download problem is to switch off the plug-in download manager, which suggests its a common problem. In each case of this happening, the file concerned is either a .zip or .rar.
The thing is, filefront is where i do a lot of my downloading, so whats the point of a download manager if the site doesnt support it? like i said, some files download ok, others rename themselves "X6" and theyre the ones i have problems with.
what am i doing wrong? any help much appreciated