Yes, you need a longer string. I just moved and am still unpacking, or I would just make you one.
A production string will be marked with the length of the bow that it fits, on the package. You can find one at
www.3riversarchery.com
I would recommend a Flemish string, as you can twist it up as it stretches in, and bring it back to proper length. Just don't untwist it very far. There are no knots in it. The twist holds it all together.
Another item you'll wanna get is a good stringer, if you don't have one. The old bend it over your leg thing is a nice way to twist a limb and really screw up your bow, unless you are really experienced at it. A lot of people don't even realize what they are doing, until it's too late.
Being a fiberglass backed bow, you dont have to unstring it every time you are done. If you choose to leave it strung, store it laying down, or hang it up. Leaning it in a corner will also mess up your limbs over time, as will storing a strung bow in a hot place (inside a car, etc).