How to register huf in traces

I am trying to register in trace from my HUF pan card but in the last/surname Colum its getting wrong every time, please tell me what should I fill over there as i am trying karta full name / surname but both are not accepting even I typed full name which is written in PAN card karta & sons that is also not acceptable,

and one more thing I want to ask that there is a refund pending in my HUF for the AY 2008-09 and the department is asking me to bring 26A to get it processed but in online the same is not available, from 2010-11 its available there, so please tell me how to get the same.