Events not recorded when using FireFox.

I'm unable to record scripts when using LR's, VUGEN(9.0.0) and FireFox(3.5.7). The mentioned URL opens in the FireFox browser but the events are not recorded.

I've set
Application Type as: Win32 Applications, Program to record: /firefox.exe, & etc.

Do I need to change any other settings? What seems to be the issue here?

Thank you,