Debug error with ICD-U64

[Snickers]

I'm using the PCWHD with the ICD-U64 the first time and have some problems with the debugger. In the past I have used my PCB with the ICD2 of Microchip without any problems. With the CCSLOAD.exe I can use the ICD-U64 for reading/writing/erasing/running target program without any problems. But when I try to use the debugger I get the following message:

Could not start target: The target was not halted after reset. Check the target oscillator and MCLR. Make sure the target clock match the clock fuse and that the target is oscillating. Use View | Valid fuses to find the correct clock fuse.

Is it a problem that I use the PIC (18F4550) with an external active crystal oscillator (20MHz) instead of one crystal component?

My used fuses are:

[monsters_inc]

Hi. On MCLR pin must be only 47k resistor to VCC.

Best Regards.