Hello there, recently i had an issu attaching a zip file to my k2 items, i have used winrar compressed the file and uploaded with no problems when I have download the zip, and trying to open it is seems corrupted

Also , i have noticed that when i have opened it a new extension (SFX ZIP) has been added to the toolbar of winrar, 

I have tried with Mozilla/Chrome/IE but still nothing

Any suggestions?

If you are using .rar try .zip instead...Carefull with filenames

What versions of K2 are you using?

I'm using the latest version + joomla 1.5, it doesn't work with any type of compression files

 (tar,rar,zip), i have also noticed that locally it works fine, for some reason , on a web server i have this issue

Disable htaccess and try again, also check your php upload limit...try a very small zip file