Debbuger Problem


I started this month working with Dynamics NAV 2013 R2, and only this week (after 2 weeks where everything went well) I stated having problems with the debugger. I open de debbuger windown and if simply frozen, It was blocked for some reason. If I just open table Active Session, it open normally, but if I open page Session List, the problem is the same. After I make same experiences I realise that the instruction DEBUGGER.ISATTACHED is the reason of that freeze.

When I restart the NAV service the debugger works normally, but after just for once. I can not restart the service every time that I need to do a debug.

There is some correction for that problem?