Another post about issues using laptop display and 2 external monitors

Hi

As many other people, I'm having trouble getting my two external monitors to work simultaneously with my laptop display.

I have a Latitude E5530 Win7 (i5) with HD 4000 graphics card.  I am using Dell DisplayPort cables to connect two new Dell U2414H monitors to an E-Port Plus Advanced Port Replicator.

I followed the instructions in the article http://www.dell.com/support/article/us/en/19/SLN115952/ko

but can only get two displays working at one time.  I've upgraded the system Bios and the video driver is the latest version 10.18.10.3993. 

Thanks in advance for all help offered.

Aiden