My Tabular Data Disappearing If Captcha Is Wrong?

In my form there is data block for experience details.

if the user clicks + button then another data block of experience details will be shown.

If i fill the experience details and after form submission if the captcha is wrong then the data blocks for experience are gone.

Please see this picture so that You can understand my problem

http://www.freeimagehosting.net/newuploads/7fnqk.jpg

Thank you in advance