rigol ds2202 does not auto on i2c

[Aido4ever]

Hi everyone.
I got my new rigol ds2202 and i got 2 problems.

1. the scope does not auto set when on i2c i only use manual setting.
2. i got no decoding on i2c.

another thing: i got no calibration certificate with the scope, and i got it with a dust on the screen. can i be it's not new?

thank you all.