DDJ RZX operates only after connecting with another laptop

DDJ RZX operates only after connecting with another laptop

I have two i7 laptops with rekordbox 6.4. One is my business and the other is my private laptop. They have identical software and drivers.

I want to do vdj gigs with my private laptop, but my DDJ RZX controller does not operate on it anymore. yes there is midi control yes, but sound no. Sound only operates after connectting with the business laptop, go to export mode, and back to performance and then plugging it over to the private laptop. This is very inconvenient.Also on the private laptop when switching on the pc out in addition to rzx asio, every few seconds the music pauze and continues.

A solution could be to reinstall the os and all drivers, but it would take me a few days, because of the other music software and samples.

I am looking for a quicker solution to solve this. Can you help?