Wording for appeal unemp denial Texas for Misconduct

I was terminated per TWC for violation of copany rules and policies, considered as misconduct connected with the work. I made a common clerical error that is made almost on a daily basis at the worksite. A co-worker also terminated for the same incident. I don't feel that fair consideration was given to extenuating circumstances surrounding the occurrence. I also feel that discipline for this type of error is administered equally to all employees. I have an almost 25 year history with this company and was given an acceptable performance eval in Sept 2011. I did appeal the termination with the HR dept of the employer and it was upheld as final (details of the investigation did not exactly match the event). I am considering filing wrongful termination for age discrimation with EEOC. Thanks