BF707 costum board with VDD-OTP=0

Folks, alas the pins VDD_OTP and VDD_USB are floating instead of being connected to VDD_EXT as recommended. The JTAG tests with my ICE1000 are ok. But when starting to debug, I get the error message "[TpsdkServer] Failed to halt processor 0". 

Is the BF707 unusable or do I have to look for another explanation?  Any ideas?   Regards Klaus-Michael