U-Mix44 With Vinyl OK, but with CD no !!

Hello, sorry for my english, is a google translation..
I worked with a U46MK2 and everything is going perfect but
other day a friend bought the U-Mix44 and testing we found the problem. With the vinyl that works perfectly but
when used with the timecode cds not going well, I mean:
If it plays the song but if we return to the top of the CD does not return to the track early, if we do not shoot cue all
marking time from the point it goes forward to the pulse of the cue.
At last, something rare, in principle drivers are the last of the U-Mix44
If someone has missed something so appreciate the help ..
Greetings
I worked with a U46MK2 and everything is going perfect but
other day a friend bought the U-Mix44 and testing we found the problem. With the vinyl that works perfectly but
when used with the timecode cds not going well, I mean:
If it plays the song but if we return to the top of the CD does not return to the track early, if we do not shoot cue all
marking time from the point it goes forward to the pulse of the cue.
At last, something rare, in principle drivers are the last of the U-Mix44
If someone has missed something so appreciate the help ..
Greetings