What Model of CradlePoint do you have? If its an EOL Router you will have issues, if its one of the current lineups like the MBR95, MBR1200B, MBR1400 you should be able to connect with the latest firmware. If your going to use your 4G connection in the Cradlepoint I recommend going this route.
Cradlepoint COR IBR600LE-VZ Integrated Broadband Router with Verizon 3G/4G Module
It takes full advantage of Verizon Wireless 3G/4G Network. Its the most reliable telemetry device on Verizon Network. You can get the gear at 3gstore
Its a cradlepoint MBR 1000, it used to work before and as far as I know I haven't changed anything.