EV1HMC321ALP4E-SP8T switch Broken after one time measurement

I bought two switches EV1HMC321ALP4E (EVAL BOARD FOR HMC321ALP4E). I could measure them only once. And then both of them broken. it is the VDD that broken (I know because the DC power supply indicator goes red after broken and no RF output  ). Would you please tell me or replace me the product? I used ESD protection band in hand always. 
I found Another SP8T switch-part number , price is higer 1127-3263-ND, EV1HMC322ALP4. Would you please say why its price is different?  is better that no problem with broken.
I need to solve it in urgent.
Would you please help me regarding this problem.