[HELPPPPPP] Internet Download Manager - Mozilla Firefox

[SyntaxSTV]

I've got a problem, when I try to download a MP3 from the internet with Internet Download Manager I get this error:

 

 

And because it's in Greek it says:

 

The browser took first the file I wanted to download so IDM couldn't take over the download but instead it downloads a website.If I need IDM to take over the download I must press a hot-key which I'll find in the options of IDM.

 

BUT HERE'S THE DAMN PROBLEM.Even if I press that hot-key, same error again.

 

HELP PLZZZ

[SyntaxSTV]

Oh come on, no-one has no idea?I need it fast.