MaxMsp 4.6.2 error: can't fragload adc~(missing <adc>.....)

MaxMSP
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o s

Hi,

I've just installed MaxMsp 4.6.2
When I try to open an old patch I get the error message:
error:can't fragload adc~(missing sys_getch>), err -2807
When I replace the adc-object with a new one and try to save the patch Max crashes.
The whole Audio seems not to work

I'am using Mac OS 4.7 on a PPC G 4 Alu Powerbook and an RME Fireface 400 Soundcard
With MaxMsp 4.5.7 everything works fine...

Thanks for a hint,

ole