Payment Form with Gantry 5

Hi friends! I try to use a Rockettheme template with Payment Forrm, but it doesn't work fine. I have test with 2 Rockettheme templates (Callisto and Requiem) but in both cases letters doesn't see when writting in the fields.

I don't know if there is a conflict between Gantry 5 and Payment Form.

Any sugestionn?

Thanks a lot!