PC Card from Verizon Wireless

I just purchased a new E1505 in March. I have started a new job and will be moving to a new location (all over the country) every 3 months. I had heard a little bit about the PC wireless cards through cell phone services that allow you to have wireless internet wherever you have cell phone service. So I went to the Verizon store (with whom I've had service with for several years) and talked to a saleslady who swore that the PC5740 broadband access/national access pc card would work with my E1505. I thought "This is great! Wireless internet wherever I go without having to set up a new service with every new location."

 

Well, low and behold, I don't think it works.  I kept plugging it in and the computer does not register so I decided to look in the slot and it is a different shape from the PC card.  Has anyone had any experience with this?  I am quite computer illiterate. I did ask before I purchased if this was returnable if it did not work with my computer and she told me I had 15 days. Am I doing something wrong or does it really not work?  I was quite disappointed. Are there other options (like different size cards) that will work? Any information regarding these PC cards will be greatly appreciated! Thanks for your help!