I have a Vp-990 programmer and I"m trying to dump the program content in a CPLD from Xilinx XC9572 in a PC44 package, When I read It i have no problems, but when I try to verify the buffer that contents the program i read with the program on the chip there appears mismatches and I don"t know wy, does anyone can help me?

I"m using a DIY adapter, I"ve added 100nf decoupling caps to the adapter board and the problem rests