The Public Utility Commission is waiting to hear from National Power Company of Houston.  Over the past week the Commission has received over 200 customer complaints about a letter raising rates.  The PUC’s Terry Hadley says the problem is all of these customers signed contracts stating their rates wouldn’t go up for the length of those contracts.  Hadley says because the company hasn’t responded to PUC questions about why it is trying to raise rates the company has been removed from the PUC’s power shopping web site, www.powertochoose.org.  Hadley says when someone signs a fixed rate contract as these customers did then rates should be just that, fixed, and not go up for the duration of the contract.