RetroBSD

Hello，
When using MPLAB,it can burn normally on-line. I am trying to burn off-line recently. HEX can be downloaded into PICKIT3 as usual.But three LEDs light immediately and they always keep the lighting situation after putting the button of PICKIT3 off.( POWER green, ACTIVE blue, STATUS red) ACTIVE LED can’t recover to flashing situation. At the final, I found the data didn’t be written in after reviewing by MPLAB. What’s wrong?
The offline burning operating file I referred to is from internet libraries.
Your help will be appreciated.