Btc Keyboard Does Anyone Know How To Resolve This BTC Brand Comp. Keyboard Issue?

Does anyone know how to resolve this BTC brand comp. keyboard issue? - btc keyboard

6100C is the keyboard, if anyone out there has or knows how it works.
The manual says to turn to this page, go and invite the reader that you / disable the button.

The fact is that developed when I do I write in certain key, such as M or J, because the keys are used as keys. How can I disable this type and all the letters like a normal keyboard?