Reply to Vci-100 new user: Help

hi to all, i'm ruben from italy. i hope you can understand my bad english!

i've bought an used vci-100 grey to use with traktor pro 1.2.7 on my mac. i would like to know

1) how can i check my firmware version?

2) is it important to upgrade the firmware?

3) is it important to have a new mapping?

5) how can i search through the song with jogwheel?

6) why the knob above 1/2 fx button doesn't work? i've tried all buttons faders and knobs but nothing!

7) why some buttons have the same utility?

thank you for your help and sorry for my bad english!