Title insurance company will not pay delinquent taxes

I purchased a home in Nov. 2008 and am now receiving delinquent tax notices. I called the county and they said it is the PID and the PID portion of the county taxes was added sometime in Nov. 2008. So the title company is saying that they paid everything that the county said was owed on the house, when they pulled tax records. When I talked to the title company they said I could call the prior owner. The house was a repo so I did call the corporation contracted to sell HUD homes in TX. I received no response. I did pay for title insurance so I called the title insurance company and their response was that I should call the prior owner until I get a response.

My understanding is that the title company was paid by both the buyer and seller to provide a clear title.

What do I do now?