program 18LF4520 problem with ICD2 clone

[lopex]

program 18LF4520

hi,

I have a ICD2 clone but I can't program 18LF4520?
I can program at 5V but now a I want program with 3.3V because I have a module zigbee and this works 3.3V, and the mplab say:

...Reading ICD Product ID
Running ICD Self Test
...Passed
MPLAB ICD 2 Ready
Programming Target...
...Validating configuration fields
...Erasing Part
...Programming Program Memory (0x0 - 0x193F)
Verifying...
...Program Memory
ICD0161: Verify failed (MemType = Program, Address = 0x568, Expected Val = 0xE01, Val Read = 0xC01)
ICD0275: Programming failed.
MPLAB ICD 2 Ready

Help me to solve this problem.

Thanks
lopex

 

[FvM]

program 18LF4520

Microchip specifies bulk erase to require a VDD of 4.5V minimum. If you have applied code protection to your device, it can't be reprogrammed at below 4.5 V. Otherwise, there may be a ICD2 programming option in effect, that also selects bulk erase. Incremental programming should work at low voltage as well, or the part is defective.

 

[Kurenai_ryu]

program 18LF4520

Also, many ICD2 Clones don`t work at 3.3v. So which one are U using?