First of all, it is not clear, if you are a realtor who helped a buyer to purchase a home for a FSBO. Or is this a consumer who dealt with a FSBO? Both are unclear. Since you purchase the home without a licensed realtor. You may run into many issues such as this one. (FSBO-For Sale By Owner)
Now that you are in this present condition and have not resolved any matters in regards to the home. It seems you may need to do research on the property at the Dallas County Appraisal Office and see who is listed as the owner of the house.
Title Company generally don't let you hang this long, had a licensed realtor was hired. You may want to contact the Title Company and find out what is going on with the house.
Unless there are issues on the house such as lien on the property or property may be in a probate court and there may be issues on the house and it will not sell. Or it can be anything that would not allow the house to obtain a clear title. A title search may help, but it would cost money to obtain it from the title company. A Quit claim deed may be issued by an attorney in an attempt to cure the cloud in the property, provided that is the delay. Consult an attorney.
Title Policy is the instrument that permits ownership of the home and generally, an Real Estate attorney may be consulted to seek your information further. Attorney may assist in clearing the cloud in the title.
Unless you have been scammed and have been defrauded by FSBO. Then consult a real estate attorney on your legal matter. Even short sale may take a long time at the title company but this is now year 2014. I have many unanswered questions on this matter. I hope you resolved your matter. Good luck.