How do i revive a wilting crape myrtle plant?

I bought a country crape myrtle plant a few feet high a few weeks ago. I planted it in my backyard here in texas. I watered it everday like it said, put root stimulater, and potting soil mixed with the dirt. Now its wilting. What am i doing wrong? How can i revive it? The leaves are still nicely green but wilted.

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