Difficulty in uploading itr 2

I have to file ITR 2 of a client in his HUF status. All excel sheets has been filled up properly and validated. Date of Creation of HUF was originaly stated as ANCESTRAL. While registering for efiling it was mentioned as 01.01.0001 last year and return for AY 2012-13 duly uploaded. But now when we vare going for upload there is an error which say XML Schema is invalid. Can any one suggest for uploading of this return.