Multiple problems with U46MK2 and Cross

Hi,
I use U46MK2 with vinyls and Cross latest version but this problems occurs with different versions of U46MK2 drivers and Cross software.
The computer specs: Intel i3 with 4gb de ram enough for run Cross.
The needles are new.
The problem:
Everything works okay but suddenly both vinyl tracks set their tempo to a slowest value. This is crazy.
Another problem is a random jump on the track. When this occurs is too hard to mix two tracks and it is so annoying.
Somebody knows a solution for this issue?
Is it possible that occurs if is not optimized U46MK2 and Cross setup? What is the best setup?
Sorry for my English.
I need help guys. I´m desperate, I tried to solve this with old drivers, old Cross releases with no luck and this continued happening.
I use U46MK2 with vinyls and Cross latest version but this problems occurs with different versions of U46MK2 drivers and Cross software.
The computer specs: Intel i3 with 4gb de ram enough for run Cross.
The needles are new.
The problem:
Everything works okay but suddenly both vinyl tracks set their tempo to a slowest value. This is crazy.
Another problem is a random jump on the track. When this occurs is too hard to mix two tracks and it is so annoying.
Somebody knows a solution for this issue?
Is it possible that occurs if is not optimized U46MK2 and Cross setup? What is the best setup?
Sorry for my English.
I need help guys. I´m desperate, I tried to solve this with old drivers, old Cross releases with no luck and this continued happening.