My gerbera daisies are wilting after only 2 days!?

I got 3 gerbera daisies 2 days ago and put them in a pot. Now all of the daisies on the right side of the pot are wilting. The others on the left side of the pot are okay. They were actually okay this morning but this evening they are all wilted. What the heck is going on? What should I do??