Cannot detect running Zend Studio

Hi,

I'm trying to create debug session using Firefox Zend Debug Toolbar but it says "Cannot detect running Zend Studio"

When i trying to manually set Zend Studio broadcast prort it says "Cannot auto detect Zend Studio settings at port: 20080"

I made all settings needed:
- Zend Debugger in dropdown in PHP section
- Settings broadcast port 20080 and checked 'Can accept external connections' in PHP -> Debug section

Not sure may be i need to set something else.

I'm using Ubuntu 10.10

Thanks for help,
Dima