1st off, it may be in shock from two things, one a new environment, and # 2 transplanting it. I never transplant a plant for at least 3 weeks after I bring one home. Plants need to become adjusted to their new surroundings ( humidity levels, temperatures, light, and how they are cared for. ) That way they can tolerate they transplanting better.
2nd palms take TONS of light inside a house. Is it getting enough light?
3rd Watering, palms are used to sandy well drained soils. Don't be afraid to water it, but just let it dry a little between waterings, as the roots need oxygen as well as moisture. This is a good rule of thumb for almost all plants.
4th Did you use any fertilizer within 2 weeks of transplanting? That is a very common mistake. The freshly torn roots of a transplanted plant send out new growth rapidly. If they come in contact with the salts in the fertilizer however they can be cauterized, and develop a callous at the tip. Slowing down the regeneration of the roots, also impairing it from absorbing water.
5th. It may have a fungi disease called leaf spot. You should go back to where you purchased the plant and find out exactly what type it is, then do a little research to see if they are prone to that disease, and what type of action you should take.

Hope this helps.

Mike

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