I was injuried in Nov of 2006,at work

after a long fight with insurance I had surgery in may of 2007, when back to work on light duty in nov 2007. and had a MMI also at that time, where I was limited to 50 lb lift, now in Jan 2008 I received a letter from my employer that said they no longer have modified work for me and let me go. I live in Texas. also my mmi was 10. can they let me go without even offering me another postition?