manual trans mission on 2001 Volkswagen Jetta

i am unable to shift into 1st 3rd and 5th gear, however i am able to shift to 2nd and fourth cables seem fine and transmission was not a problem any thoughts as to what the problem may be

Asked by for the 2001 Volkswagen Jetta
My guess would be either a clutch concern or internal gear selector (syncro) locked up. You may need a tear down to inspect your concern.