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MSP430FR4133 单片机烧写完第一次程序后,不能烧写第二次了,报错说熔丝断了,求指教。

Other Parts Discussed in Thread: MSP430FR4133

使用的工具:IAR for MSP430 7.3版本
仿真器:MSP-FET430UIF
使用的单片机:MSP430 FR4133

问题:
已经试过很多种方法了,都不行,包括用Lite FET-Pro430 Elprotronic工具烧写TXT文件,hex文件,擦除等,重新上电复位等等。

之前写的简单的测试程序一直可以正常烧写程序,后来下载了 TI官网中MSP430FR4133的示例程序:对应的远程空调控制程序,进行修改,增加了一个定时器和P8.2引脚作为计数器,烧写完第一次后,烧第二次程序时出现下面问题:
Using license: Standalone license - IAR Embedded Workbench for Texas Instruments MSP430
Firmware version 3.5.1.1
Interface dll version unknown
Security Fuse has been blown : (OpenDevice) , Device=MSP430FR4133, PwLength=0x0
Could not find device (or device not supported) Session aborted!