gearbox problem?

[Jesske]

Sometimes it happens. When I leave in first and take it upto 7000 rpm, then I change to 2nd gear, it won't go and it's crunching.
What can this be? I have this problem for more than a year, but it's not that bad because it doesn't happen all the time

Thanx

 

[Johnc172]

Try leaving the clutch down longer before changing into second for the revs to drop, if it goes in fine, then it's more than likely the syncro has gone